CVE-2025-39682
published 2025-09-05CVE-2025-39682: In the Linux kernel, the following vulnerability has been resolved: tls: fix handling of zero-length records on the rx_list Each recvmsg() call must process…
PriorityP181critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
KEVITWEXPLOITInitial access
CISA Known Exploited Vulnerabilitydue 2026-09-21
Exploited in the wild
EPSS
2.88%
86.7th percentile
In the Linux kernel, the following vulnerability has been resolved:
tls: fix handling of zero-length records on the rx_list
Each recvmsg() call must process either
- only contiguous DATA records (any number of them)
- one non-DATA record
If the next record has different type than what has already been
processed we break out of the main processing loop. If the record
has already been decrypted (which may be the case for TLS 1.3 where
we don't know type until decryption) we queue the pending record
to the rx_list. Next recvmsg() will pick it up from there.
Queuing the skb to rx_list after zero-copy decrypt is not possible,
since in that case we decrypted directly to the user space buffer,
and we don't have an skb to queue (darg.skb points to the ciphertext
skb for access to metadata like length).
Only data records are allowed zero-copy, and we break the processing
loop after each non-data record. So we should never zero-copy and
then find out that the record type has changed. The corner case
we missed is when the initial record comes from rx_list, and it's
zero length.
Affected
22 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | linux | < linux 6.1.153-1 (bookworm) | linux 6.1.153-1 (bookworm) |
| debian | linux-6.1 | < linux 6.1.153-1 (bookworm) | linux 6.1.153-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 84c61fe1a75b4255df1e1e7c054c9e6d048da417 < 2902c3ebcca52ca845c03182000e8d71d3a5196f | 2902c3ebcca52ca845c03182000e8d71d3a5196f |
| linux | linux | >= 84c61fe1a75b4255df1e1e7c054c9e6d048da417 < c09dd3773b5950e9cfb6c9b9a5f6e36d06c62677 | c09dd3773b5950e9cfb6c9b9a5f6e36d06c62677 |
| linux | linux | >= 84c61fe1a75b4255df1e1e7c054c9e6d048da417 < 3439c15ae91a517cf3c650ea15a8987699416ad9 | 3439c15ae91a517cf3c650ea15a8987699416ad9 |
| linux | linux | >= 84c61fe1a75b4255df1e1e7c054c9e6d048da417 < 29c0ce3c8cdb6dc5d61139c937f34cb888a6f42e | 29c0ce3c8cdb6dc5d61139c937f34cb888a6f42e |
| linux | linux | >= 84c61fe1a75b4255df1e1e7c054c9e6d048da417 < 62708b9452f8eb77513115b17c4f8d1a22ebf843 | 62708b9452f8eb77513115b17c4f8d1a22ebf843 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 6.1.153-1 | 6.1.153-1 |
| linux | linux_kernel | >= 0 < 6.12.48-1 | 6.12.48-1 |
| linux | linux_kernel | >= 0 < 6.16.5-1 | 6.16.5-1 |
| linux | linux_kernel | >= 0 < 6.8.0-86.87 | 6.8.0-86.87 |
| linux | linux_kernel | >= 6.0 < 6.1.149 | 6.1.149 |
| linux | linux_kernel | >= 6.13 < 6.16.4 | 6.16.4 |
| linux | linux_kernel | >= 6.2 < 6.6.103 | 6.6.103 |
| linux | linux_kernel | >= 6.7 < 6.12.44 | 6.12.44 |
| msrc | azl3_kernel_6.6.96.2-1_on_azure_linux_3.0 | — | — |
| msrc | azl3_kernel_6.6.96.2-2_on_azure_linux_3.0 | — | — |
| siemens | simatic_cn_4100_firmware | < 5.0 | 5.0 |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
osv7.1HIGH
vulncheck7.1HIGH
cisa7.1HIGH
vendor_debian7.1HIGH
vendor_redhat7.1HIGH
vendor_ubuntu7.1HIGH
vendor_msrc6.5MEDIUM
CVEs like this are exactly what “Exploited This Week” covers.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
VulDB
Linux Kernel up to 6.17-rc2 recvmsg buffer overflow (Nessus ID 261606 / WID-SEC-2025-1988)
vuldb·2026-09-19·CVSS 7.1
CVE-2025-39682 [HIGH] Linux Kernel up to 6.17-rc2 recvmsg buffer overflow (Nessus ID 261606 / WID-SEC-2025-1988)
A vulnerability labeled as critical has been found in Linux Kernel up to 6.1.148/6.6.102/6.12.43/6.16.3/6.17-rc2. This impacts the function recvmsg. Such manipulation leads to buffer overflow.
This vulnerability is uniquely identified as CVE-2025-39682. The attack can only be initiated within the local network. Moreover, an exploit is present.
The affected component should be upgraded.
OSV
CVE-2025-39682: In tls_sw_recvmsg of tls_sw
osv·2026-03-01
CVE-2025-39682 CVE-2025-39682: In tls_sw_recvmsg of tls_sw
In tls_sw_recvmsg of tls_sw.c, there is a possible use after free due to an incorrect bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
OSV
linux-azure-nvidia vulnerabilities
osv·2026-01-09·CVSS 7.1
CVE-2025-40300 [HIGH] linux-azure-nvidia vulnerabilities
linux-azure-nvidia vulnerabilities
Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered
that the Linux kernel contained insufficient branch predictor isolation
between a guest and a userspace hypervisor for certain processors. This
flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this
to expose sensitive information from the host OS. (CVE-2025-40300)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- Cryptographic API;
- ACPI drivers;
- Ublk userspace block driver;
- Clock framework and drivers;
- EDAC drivers;
- GPU drivers;
- HSI subsystem;
- IIO s
OSV
linux-azure-fips vulnerabilities
osv·2025-12-17·CVSS 7.1
CVE-2025-40300 [HIGH] linux-azure-fips vulnerabilities
linux-azure-fips vulnerabilities
Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered
that the Linux kernel contained insufficient branch predictor isolation
between a guest and a userspace hypervisor for certain processors. This
flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this
to expose sensitive information from the host OS. (CVE-2025-40300)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- Cryptographic API;
- ACPI drivers;
- Ublk userspace block driver;
- Clock framework and drivers;
- EDAC drivers;
- GPU drivers;
- HSI subsystem;
- IIO sub
OSV
linux-raspi vulnerabilities
osv·2025-11-25·CVSS 7.1
[HIGH] linux-raspi vulnerabilities
linux-raspi vulnerabilities
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- ACPI drivers;
- Ublk userspace block driver;
- Clock framework and drivers;
- EDAC drivers;
- GPU drivers;
- IIO subsystem;
- InfiniBand drivers;
- Media drivers;
- MemoryStick subsystem;
- Network drivers;
- NTB driver;
- PCI subsystem;
- Remote Processor subsystem;
- Thermal drivers;
- Virtio Host (VHOST) subsystem;
- 9P distributed file system;
- File systems infrastructure;
- JFS file system;
- Network file system (NFS) server daemon;
- NTFS3 file system;
- SMB network file system;
- Memory management;
- RDMA verb
OSV
linux-raspi-realtime vulnerabilities
osv·2025-11-24·CVSS 7.1
[HIGH] linux-raspi-realtime vulnerabilities
linux-raspi-realtime vulnerabilities
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- ACPI drivers;
- Ublk userspace block driver;
- Clock framework and drivers;
- EDAC drivers;
- GPU drivers;
- IIO subsystem;
- InfiniBand drivers;
- Media drivers;
- MemoryStick subsystem;
- Network drivers;
- NTB driver;
- PCI subsystem;
- Remote Processor subsystem;
- Thermal drivers;
- Virtio Host (VHOST) subsystem;
- 9P distributed file system;
- File systems infrastructure;
- JFS file system;
- Network file system (NFS) server daemon;
- NTFS3 file system;
- SMB network file system;
- Memory management;
-
OSV
linux-aws-6.8 vulnerabilities
osv·2025-11-12·CVSS 7.1
[HIGH] linux-aws-6.8 vulnerabilities
linux-aws-6.8 vulnerabilities
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- ACPI drivers;
- Ublk userspace block driver;
- Clock framework and drivers;
- GPU drivers;
- IIO subsystem;
- InfiniBand drivers;
- Media drivers;
- MemoryStick subsystem;
- Network drivers;
- NTB driver;
- PCI subsystem;
- Remote Processor subsystem;
- Thermal drivers;
- Virtio Host (VHOST) subsystem;
- 9P distributed file system;
- File systems infrastructure;
- JFS file system;
- Network file system (NFS) server daemon;
- NTFS3 file system;
- SMB network file system;
- Memory management;
- RDMA verbs API;
- Kerne
OSV
linux-oracle-6.8 vulnerabilities
osv·2025-11-06·CVSS 7.1
[HIGH] linux-oracle-6.8 vulnerabilities
linux-oracle-6.8 vulnerabilities
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- ACPI drivers;
- Ublk userspace block driver;
- Clock framework and drivers;
- GPU drivers;
- IIO subsystem;
- InfiniBand drivers;
- Media drivers;
- MemoryStick subsystem;
- Network drivers;
- NTB driver;
- PCI subsystem;
- Remote Processor subsystem;
- Thermal drivers;
- Virtio Host (VHOST) subsystem;
- 9P distributed file system;
- File systems infrastructure;
- JFS file system;
- Network file system (NFS) server daemon;
- NTFS3 file system;
- SMB network file system;
- Memory management;
- RDMA verbs API;
- Ke
OSV
linux-hwe-6.14 vulnerabilities
osv·2025-11-04·CVSS 5.6
CVE-2024-36350 [MEDIUM] linux-hwe-6.14 vulnerabilities
linux-hwe-6.14 vulnerabilities
Oleksii Oleksenko, Cedric Fournet, Jana Hofmann, Boris Köpf, Stavros Volos,
and Flavien Solt discovered that some AMD processors may allow an attacker
to infer data from previous stores, potentially resulting in the leakage of
privileged information. A local attacker could possibly use this to expose
sensitive information. (CVE-2024-36350, CVE-2024-36357)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
- ACPI drivers;
- Serial ATA and Parallel ATA drivers;
- ATM drivers;
- Drivers core;
- ATA over ethernet (AOE) driver;
OSV
linux-hwe-6.8 vulnerabilities
osv·2025-10-31·CVSS 7.1
[HIGH] linux-hwe-6.8 vulnerabilities
linux-hwe-6.8 vulnerabilities
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- ACPI drivers;
- Ublk userspace block driver;
- Clock framework and drivers;
- GPU drivers;
- IIO subsystem;
- InfiniBand drivers;
- Media drivers;
- MemoryStick subsystem;
- Network drivers;
- NTB driver;
- PCI subsystem;
- Remote Processor subsystem;
- Thermal drivers;
- Virtio Host (VHOST) subsystem;
- 9P distributed file system;
- File systems infrastructure;
- JFS file system;
- Network file system (NFS) server daemon;
- NTFS3 file system;
- SMB network file system;
- Memory management;
- RDMA verbs API;
- Kerne
OSV
linux-gcp-6.14 vulnerabilities
osv·2025-10-31·CVSS 5.6
CVE-2024-36350 [MEDIUM] linux-gcp-6.14 vulnerabilities
linux-gcp-6.14 vulnerabilities
Oleksii Oleksenko, Cedric Fournet, Jana Hofmann, Boris Köpf, Stavros Volos,
and Flavien Solt discovered that some AMD processors may allow an attacker
to infer data from previous stores, potentially resulting in the leakage of
privileged information. A local attacker could possibly use this to expose
sensitive information. (CVE-2024-36350, CVE-2024-36357)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
- ACPI drivers;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- ATA over ethernet (AOE) driver;
- Ublk userspa
OSV
linux-aws-6.14 vulnerabilities
osv·2025-10-24·CVSS 5.6
CVE-2024-36350 [MEDIUM] linux-aws-6.14 vulnerabilities
linux-aws-6.14 vulnerabilities
Oleksii Oleksenko, Cedric Fournet, Jana Hofmann, Boris Köpf, Stavros Volos,
and Flavien Solt discovered that some AMD processors may allow an attacker
to infer data from previous stores, potentially resulting in the leakage of
privileged information. A local attacker could possibly use this to expose
sensitive information. (CVE-2024-36350, CVE-2024-36357)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
- ACPI drivers;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- ATA over ethernet (AOE) driver;
- Ublk userspa
OSV
linux-realtime-6.14 vulnerabilities
osv·2025-10-22·CVSS 5.6
CVE-2024-36350 [MEDIUM] linux-realtime-6.14 vulnerabilities
linux-realtime-6.14 vulnerabilities
Oleksii Oleksenko, Cedric Fournet, Jana Hofmann, Boris Köpf, Stavros Volos,
and Flavien Solt discovered that some AMD processors may allow an attacker
to infer data from previous stores, potentially resulting in the leakage of
privileged information. A local attacker could possibly use this to expose
sensitive information. (CVE-2024-36350, CVE-2024-36357)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
- ACPI drivers;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- ATA over ethernet (AOE) driver;
- Ublk us
OSV
linux-azure, linux-azure-6.14, linux-azure-nvidia-6.14 vulnerabilities
osv·2025-10-22·CVSS 5.6
CVE-2024-36350 [MEDIUM] linux-azure, linux-azure-6.14, linux-azure-nvidia-6.14 vulnerabilities
linux-azure, linux-azure-6.14, linux-azure-nvidia-6.14 vulnerabilities
Oleksii Oleksenko, Cedric Fournet, Jana Hofmann, Boris Köpf, Stavros Volos,
and Flavien Solt discovered that some AMD processors may allow an attacker
to infer data from previous stores, potentially resulting in the leakage of
privileged information. A local attacker could possibly use this to expose
sensitive information. (CVE-2024-36350, CVE-2024-36357)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
- ACPI drivers;
- Serial ATA and Parallel ATA drivers;
- Drivers core;
- ATA ov
OSV
linux-realtime, linux-realtime-6.8 vulnerabilities
osv·2025-10-22·CVSS 7.1
[HIGH] linux-realtime, linux-realtime-6.8 vulnerabilities
linux-realtime, linux-realtime-6.8 vulnerabilities
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- ACPI drivers;
- Ublk userspace block driver;
- Clock framework and drivers;
- GPU drivers;
- IIO subsystem;
- InfiniBand drivers;
- Media drivers;
- MemoryStick subsystem;
- Network drivers;
- NTB driver;
- PCI subsystem;
- Remote Processor subsystem;
- Thermal drivers;
- Virtio Host (VHOST) subsystem;
- 9P distributed file system;
- File systems infrastructure;
- JFS file system;
- Network file system (NFS) server daemon;
- NTFS3 file system;
- SMB network file system;
- Memory management;
- RD
OSV
linux, linux-aws, linux-azure, linux-azure-6.8, linux-gcp, linux-gkeop, linux-ibm, linux-ibm-6.8, linux-lowlatency, linux-lowlatency-hwe-6.8, linux-oracle vulnerabilities
osv·2025-10-22·CVSS 7.1
[HIGH] linux, linux-aws, linux-azure, linux-azure-6.8, linux-gcp, linux-gkeop, linux-ibm, linux-ibm-6.8, linux-lowlatency, linux-lowlatency-hwe-6.8, linux-oracle vulnerabilities
linux, linux-aws, linux-azure, linux-azure-6.8, linux-gcp, linux-gkeop, linux-ibm, linux-ibm-6.8, linux-lowlatency, linux-lowlatency-hwe-6.8, linux-oracle vulnerabilities
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- ACPI drivers;
- Ublk userspace block driver;
- Clock framework and drivers;
- GPU drivers;
- IIO subsystem;
- InfiniBand drivers;
- Media drivers;
- MemoryStick subsystem;
- Network drivers;
- NTB driver;
- PCI subsystem;
- Remote Processor subsystem;
- Thermal drivers;
- Virtio Host (VHOST) subsystem;
- 9P distributed file system;
- File systems infrastructure;
- JFS file syst
OSV
linux-gcp-6.8, linux-gke, linux-nvidia, linux-nvidia-6.8, linux-nvidia-lowlatency vulnerabilities
osv·2025-10-22·CVSS 7.1
[HIGH] linux-gcp-6.8, linux-gke, linux-nvidia, linux-nvidia-6.8, linux-nvidia-lowlatency vulnerabilities
linux-gcp-6.8, linux-gke, linux-nvidia, linux-nvidia-6.8, linux-nvidia-lowlatency vulnerabilities
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- ACPI drivers;
- Ublk userspace block driver;
- Clock framework and drivers;
- GPU drivers;
- IIO subsystem;
- InfiniBand drivers;
- Media drivers;
- MemoryStick subsystem;
- Network drivers;
- NTB driver;
- PCI subsystem;
- Remote Processor subsystem;
- Thermal drivers;
- Virtio Host (VHOST) subsystem;
- 9P distributed file system;
- File systems infrastructure;
- JFS file system;
- Network file system (NFS) server daemon;
- NTFS3 file system;
- SMB
OSV
linux, linux-aws, linux-gcp, linux-oem-6.14, linux-oracle, linux-oracle-6.14, linux-raspi, linux-realtime vulnerabilities
osv·2025-10-21·CVSS 5.6
CVE-2024-36350 [MEDIUM] linux, linux-aws, linux-gcp, linux-oem-6.14, linux-oracle, linux-oracle-6.14, linux-raspi, linux-realtime vulnerabilities
linux, linux-aws, linux-gcp, linux-oem-6.14, linux-oracle, linux-oracle-6.14, linux-raspi, linux-realtime vulnerabilities
Oleksii Oleksenko, Cedric Fournet, Jana Hofmann, Boris Köpf, Stavros Volos,
and Flavien Solt discovered that some AMD processors may allow an attacker
to infer data from previous stores, potentially resulting in the leakage of
privileged information. A local attacker could possibly use this to expose
sensitive information. (CVE-2024-36350, CVE-2024-36357)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
- ACPI drivers;
- Serial ATA
OSV
CVE-2025-39682: In the Linux kernel, the following vulnerability has been resolved: tls: fix handling of zero-length records on the rx_list Each recvmsg() call must p
osv·2025-09-05·CVSS 7.1
CVE-2025-39682 [HIGH] CVE-2025-39682: In the Linux kernel, the following vulnerability has been resolved: tls: fix handling of zero-length records on the rx_list Each recvmsg() call must p
In the Linux kernel, the following vulnerability has been resolved: tls: fix handling of zero-length records on the rx_list Each recvmsg() call must process either - only contiguous DATA records (any number of them) - one non-DATA record If the next record has different type than what has already been processed we break out of the main processing loop. If the record has already been decrypted (which may be the case for TLS 1.3 where we don't know type until decryption) we queue the pending record to the rx_list. Next recvmsg() will pick it up from there. Queuing the skb to rx_list after zero-copy decrypt is not possible, since in that case we decrypted directly to the user space buffer, and we don't have an skb to queue (darg.skb points to the ciphertext skb for access to metadata like len
GHSA
GHSA-v2pf-75pf-9c5h: In the Linux kernel, the following vulnerability has been resolved:
tls: fix handling of zero-length records on the rx_list
Each recvmsg() call must
ghsa_unreviewed·2025-09-05
CVE-2025-39682 [HIGH] GHSA-v2pf-75pf-9c5h: In the Linux kernel, the following vulnerability has been resolved:
tls: fix handling of zero-length records on the rx_list
Each recvmsg() call must
In the Linux kernel, the following vulnerability has been resolved:
tls: fix handling of zero-length records on the rx_list
Each recvmsg() call must process either
- only contiguous DATA records (any number of them)
- one non-DATA record
If the next record has different type than what has already been
processed we break out of the main processing loop. If the record
has already been decrypted (which may be the case for TLS 1.3 where
we don't know type until decryption) we queue the pending record
to the rx_list. Next recvmsg() will pick it up from there.
Queuing the skb to rx_list after zero-copy decrypt is not possible,
since in that case we decrypted directly to the user space buffer,
and we don't have an skb to queue (darg.skb points to the ciphertext
skb for access to metadata like
VulnCheck
Linux Kernel Improper Check for Unusual or Exceptional Conditions Vulnerability
vulncheck·2025·CVSS 7.1
CVE-2025-39682 [HIGH] CWE-754 Linux Kernel Improper Check for Unusual or Exceptional Conditions Vulnerability
Linux Kernel Improper Check for Unusual or Exceptional Conditions Vulnerability
Linux Kernel contains an improper check for unusual or exceptional conditions vulnerability in the TLS receive path which allows a zero-length record retrieved from the rx_list to bypass the intended recvmsg() record-type handling, potentially causing subsequent TLS records to be processed using incorrect zero-copy and queuing assumptions. The impacted product(s) could be end-of-life (EoL) and/or end-of-service (EoS). Users are advised to discontinue use and/or transition to a supported version.
Affected: Linux Kernel
Required Action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and
CISA
Linux Kernel Improper Check for Unusual or Exceptional Conditions Vulnerability
cisa·2026-09-18·CVSS 7.1
CVE-2025-39682 [HIGH] CWE-754 Linux Kernel Improper Check for Unusual or Exceptional Conditions Vulnerability
Vulnerability: Linux Kernel Improper Check for Unusual or Exceptional Conditions Vulnerability
Affected: Linux Kernel
Linux Kernel contains an improper check for unusual or exceptional conditions vulnerability in the TLS receive path which allows a zero-length record retrieved from the rx_list to bypass the intended recvmsg() record-type handling, potentially causing subsequent TLS records to be processed using incorrect zero-copy and queuing assumptions. The impacted product(s) could be end-of-life (EoL) and/or end-of-service (EoS). Users are advised to discontinue use and/or transition to a supported version.
Required Action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes)
Ubuntu
Linux kernel (Azure, N-Series) vulnerabilities
vendor_ubuntu·2026-01-09·CVSS 7.1
CVE-2025-38575 [HIGH] Linux kernel (Azure, N-Series) vulnerabilities
Title: Linux kernel (Azure, N-Series) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered
that the Linux kernel contained insufficient branch predictor isolation
between a guest and a userspace hypervisor for certain processors. This
flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this
to expose sensitive information from the host OS. (CVE-2025-40300)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- Cryptographic API;
- ACPI drivers;
- Ublk userspace block driver;
-
Ubuntu
Linux kernel (Azure FIPS) vulnerabilities
vendor_ubuntu·2025-12-17·CVSS 7.1
CVE-2025-22060 [HIGH] Linux kernel (Azure FIPS) vulnerabilities
Title: Linux kernel (Azure FIPS) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered
that the Linux kernel contained insufficient branch predictor isolation
between a guest and a userspace hypervisor for certain processors. This
flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this
to expose sensitive information from the host OS. (CVE-2025-40300)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- Cryptographic API;
- ACPI drivers;
- Ublk userspace block driver;
- Cloc
Ubuntu
Linux kernel (Raspberry Pi) vulnerabilities
vendor_ubuntu·2025-11-25·CVSS 7.1
CVE-2025-38152 [HIGH] Linux kernel (Raspberry Pi) vulnerabilities
Title: Linux kernel (Raspberry Pi) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- ACPI drivers;
- Ublk userspace block driver;
- Clock framework and drivers;
- EDAC drivers;
- GPU drivers;
- IIO subsystem;
- InfiniBand drivers;
- Media drivers;
- MemoryStick subsystem;
- Network drivers;
- NTB driver;
- PCI subsystem;
- Remote Processor subsystem;
- Thermal drivers;
- Virtio Host (VHOST) subsystem;
- 9P distributed file system;
- File systems infrastructure;
- JFS file system;
- Network file system (NFS) server
Ubuntu
Linux kernel (Raspberry Pi Real-time) vulnerabilities
vendor_ubuntu·2025-11-24·CVSS 7.1
CVE-2025-38152 [HIGH] Linux kernel (Raspberry Pi Real-time) vulnerabilities
Title: Linux kernel (Raspberry Pi Real-time) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- ACPI drivers;
- Ublk userspace block driver;
- Clock framework and drivers;
- EDAC drivers;
- GPU drivers;
- IIO subsystem;
- InfiniBand drivers;
- Media drivers;
- MemoryStick subsystem;
- Network drivers;
- NTB driver;
- PCI subsystem;
- Remote Processor subsystem;
- Thermal drivers;
- Virtio Host (VHOST) subsystem;
- 9P distributed file system;
- File systems infrastructure;
- JFS file system;
- Network file system (N
Ubuntu
Linux kernel (AWS) vulnerabilities
vendor_ubuntu·2025-11-12·CVSS 7.1
CVE-2025-22033 [HIGH] Linux kernel (AWS) vulnerabilities
Title: Linux kernel (AWS) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- ACPI drivers;
- Ublk userspace block driver;
- Clock framework and drivers;
- GPU drivers;
- IIO subsystem;
- InfiniBand drivers;
- Media drivers;
- MemoryStick subsystem;
- Network drivers;
- NTB driver;
- PCI subsystem;
- Remote Processor subsystem;
- Thermal drivers;
- Virtio Host (VHOST) subsystem;
- 9P distributed file system;
- File systems infrastructure;
- JFS file system;
- Network file system (NFS) server daemon;
- NTFS3 file sys
Ubuntu
Linux kernel (Oracle) vulnerabilities
vendor_ubuntu·2025-11-06·CVSS 7.1
CVE-2024-58092 [HIGH] Linux kernel (Oracle) vulnerabilities
Title: Linux kernel (Oracle) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- ACPI drivers;
- Ublk userspace block driver;
- Clock framework and drivers;
- GPU drivers;
- IIO subsystem;
- InfiniBand drivers;
- Media drivers;
- MemoryStick subsystem;
- Network drivers;
- NTB driver;
- PCI subsystem;
- Remote Processor subsystem;
- Thermal drivers;
- Virtio Host (VHOST) subsystem;
- 9P distributed file system;
- File systems infrastructure;
- JFS file system;
- Network file system (NFS) server daemon;
- NTFS3 file
Ubuntu
Linux kernel (HWE) vulnerabilities
vendor_ubuntu·2025-11-04·CVSS 5.6
CVE-2025-38231 [MEDIUM] Linux kernel (HWE) vulnerabilities
Title: Linux kernel (HWE) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Oleksii Oleksenko, Cedric Fournet, Jana Hofmann, Boris Köpf, Stavros Volos,
and Flavien Solt discovered that some AMD processors may allow an attacker
to infer data from previous stores, potentially resulting in the leakage of
privileged information. A local attacker could possibly use this to expose
sensitive information. (CVE-2024-36350, CVE-2024-36357)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
- ACPI drivers;
- Serial ATA and Parallel
Ubuntu
Linux kernel (GCP) vulnerabilities
vendor_ubuntu·2025-10-31·CVSS 5.6
CVE-2025-38263 [MEDIUM] Linux kernel (GCP) vulnerabilities
Title: Linux kernel (GCP) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Oleksii Oleksenko, Cedric Fournet, Jana Hofmann, Boris Köpf, Stavros Volos,
and Flavien Solt discovered that some AMD processors may allow an attacker
to infer data from previous stores, potentially resulting in the leakage of
privileged information. A local attacker could possibly use this to expose
sensitive information. (CVE-2024-36350, CVE-2024-36357)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
- ACPI drivers;
- Serial ATA and Parallel
Ubuntu
Linux kernel (HWE) vulnerabilities
vendor_ubuntu·2025-10-31·CVSS 7.1
CVE-2025-22072 [HIGH] Linux kernel (HWE) vulnerabilities
Title: Linux kernel (HWE) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- ACPI drivers;
- Ublk userspace block driver;
- Clock framework and drivers;
- GPU drivers;
- IIO subsystem;
- InfiniBand drivers;
- Media drivers;
- MemoryStick subsystem;
- Network drivers;
- NTB driver;
- PCI subsystem;
- Remote Processor subsystem;
- Thermal drivers;
- Virtio Host (VHOST) subsystem;
- 9P distributed file system;
- File systems infrastructure;
- JFS file system;
- Network file system (NFS) server daemon;
- NTFS3 file sys
Ubuntu
Linux kernel (AWS) vulnerabilities
vendor_ubuntu·2025-10-24·CVSS 5.6
CVE-2024-36357 [MEDIUM] Linux kernel (AWS) vulnerabilities
Title: Linux kernel (AWS) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Oleksii Oleksenko, Cedric Fournet, Jana Hofmann, Boris Köpf, Stavros Volos,
and Flavien Solt discovered that some AMD processors may allow an attacker
to infer data from previous stores, potentially resulting in the leakage of
privileged information. A local attacker could possibly use this to expose
sensitive information. (CVE-2024-36350, CVE-2024-36357)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
- ACPI drivers;
- Serial ATA and Parallel
Ubuntu
Linux kernel (Azure) vulnerabilities
vendor_ubuntu·2025-10-22·CVSS 5.6
CVE-2025-38424 [MEDIUM] Linux kernel (Azure) vulnerabilities
Title: Linux kernel (Azure) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Oleksii Oleksenko, Cedric Fournet, Jana Hofmann, Boris Köpf, Stavros Volos,
and Flavien Solt discovered that some AMD processors may allow an attacker
to infer data from previous stores, potentially resulting in the leakage of
privileged information. A local attacker could possibly use this to expose
sensitive information. (CVE-2024-36350, CVE-2024-36357)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
- ACPI drivers;
- Serial ATA and Paralle
Ubuntu
Linux kernel (Real-time) vulnerabilities
vendor_ubuntu·2025-10-22·CVSS 5.6
CVE-2025-38373 [MEDIUM] Linux kernel (Real-time) vulnerabilities
Title: Linux kernel (Real-time) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Oleksii Oleksenko, Cedric Fournet, Jana Hofmann, Boris Köpf, Stavros Volos,
and Flavien Solt discovered that some AMD processors may allow an attacker
to infer data from previous stores, potentially resulting in the leakage of
privileged information. A local attacker could possibly use this to expose
sensitive information. (CVE-2024-36350, CVE-2024-36357)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
- ACPI drivers;
- Serial ATA and Par
Ubuntu
Linux kernel (Real-time) vulnerabilities
vendor_ubuntu·2025-10-22·CVSS 7.1
CVE-2025-22054 [HIGH] Linux kernel (Real-time) vulnerabilities
Title: Linux kernel (Real-time) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- ACPI drivers;
- Ublk userspace block driver;
- Clock framework and drivers;
- GPU drivers;
- IIO subsystem;
- InfiniBand drivers;
- Media drivers;
- MemoryStick subsystem;
- Network drivers;
- NTB driver;
- PCI subsystem;
- Remote Processor subsystem;
- Thermal drivers;
- Virtio Host (VHOST) subsystem;
- 9P distributed file system;
- File systems infrastructure;
- JFS file system;
- Network file system (NFS) server daemon;
- NTFS3 fi
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2025-10-22·CVSS 7.1
CVE-2025-22054 [HIGH] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- x86 architecture;
- ACPI drivers;
- Ublk userspace block driver;
- Clock framework and drivers;
- GPU drivers;
- IIO subsystem;
- InfiniBand drivers;
- Media drivers;
- MemoryStick subsystem;
- Network drivers;
- NTB driver;
- PCI subsystem;
- Remote Processor subsystem;
- Thermal drivers;
- Virtio Host (VHOST) subsystem;
- 9P distributed file system;
- File systems infrastructure;
- JFS file system;
- Network file system (NFS) server daemon;
- NTFS3 file system;
-
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2025-10-21·CVSS 5.6
CVE-2025-38424 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Oleksii Oleksenko, Cedric Fournet, Jana Hofmann, Boris Köpf, Stavros Volos,
and Flavien Solt discovered that some AMD processors may allow an attacker
to infer data from previous stores, potentially resulting in the leakage of
privileged information. A local attacker could possibly use this to expose
sensitive information. (CVE-2024-36350, CVE-2024-36357)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- PowerPC architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
- ACPI drivers;
- Serial ATA and Parallel ATA dr
Microsoft
tls: fix handling of zero-length records on the rx_list
vendor_msrc·2025-09-09·CVSS 6.5
CVE-2025-39682 [HIGH] tls: fix handling of zero-length records on the rx_list
tls: fix handling of zero-length records on the rx_list
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
Linux: Linux
Customer Action Required: Yes
Remediation: CBL-Mariner Releases
Reference: https://learn
Red Hat
kernel: tls: fix handling of zero-length records on the rx_list
vendor_redhat·2025-09-05·CVSS 7.1
CVE-2025-39682 [HIGH] kernel: tls: fix handling of zero-length records on the rx_list
kernel: tls: fix handling of zero-length records on the rx_list
In the Linux kernel, the following vulnerability has been resolved:
tls: fix handling of zero-length records on the rx_list
Each recvmsg() call must process either
- only contiguous DATA records (any number of them)
- one non-DATA record
If the next record has different type than what has already been
processed we break out of the main processing loop. If the record
has already been decrypted (which may be the case for TLS 1.3 where
we don't know type until decryption) we queue the pending record
to the rx_list. Next recvmsg() will pick it up from there.
Queuing the skb to rx_list after zero-copy decrypt is not possible,
since in that case we decrypted directly to the user space buffer,
and we don't have an skb to queue (darg
Debian
CVE-2025-39682: linux - In the Linux kernel, the following vulnerability has been resolved: tls: fix ha...
vendor_debian·2025·CVSS 7.1
CVE-2025-39682 [HIGH] CVE-2025-39682: linux - In the Linux kernel, the following vulnerability has been resolved: tls: fix ha...
In the Linux kernel, the following vulnerability has been resolved: tls: fix handling of zero-length records on the rx_list Each recvmsg() call must process either - only contiguous DATA records (any number of them) - one non-DATA record If the next record has different type than what has already been processed we break out of the main processing loop. If the record has already been decrypted (which may be the case for TLS 1.3 where we don't know type until decryption) we queue the pending record to the rx_list. Next recvmsg() will pick it up from there. Queuing the skb to rx_list after zero-copy decrypt is not possible, since in that case we decrypted directly to the user space buffer, and we don't have an skb to queue (darg.skb points to the ciphertext skb for access to metadata like len
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2025-39682 kernel: tls: fix handling of zero-length records on the rx_list
bugzilla·2025-09-05·CVSS 7.1
CVE-2025-39682 [HIGH] CVE-2025-39682 kernel: tls: fix handling of zero-length records on the rx_list
CVE-2025-39682 kernel: tls: fix handling of zero-length records on the rx_list
In the Linux kernel, the following vulnerability has been resolved:
tls: fix handling of zero-length records on the rx_list
Each recvmsg() call must process either
- only contiguous DATA records (any number of them)
- one non-DATA record
If the next record has different type than what has already been
processed we break out of the main processing loop. If the record
has already been decrypted (which may be the case for TLS 1.3 where
we don't know type until decryption) we queue the pending record
to the rx_list. Next recvmsg() will pick it up from there.
Queuing the skb to rx_list after zero-copy decrypt is not possible,
since in that case we decrypted directly to the user space buffer,
and we don't have an
Qualys
CISA BOD 26-04 Timelines for Three Linux Kernel CVEs
blogs_qualys·2026-09-23·CVSS 9.8
CVE-2025-39682 [CRITICAL] CISA BOD 26-04 Timelines for Three Linux Kernel CVEs
## Table of Contents
The Three Linux Kernel CVEs in KEV
CISA BOD 26-04 Remediation Timeline
Why This Matters
Our Recommendation: Deploy the Kernel Updates with Qualys TruRisk Eliminate
## Executive Summary
CISA added three actively exploited Linux kernel vulnerabilities: CVE-2025-39682, CVE-2026-53266, and CVE-2025-39964 to its KEV Catalog on September 18, 2026, triggering a 3-day remediation deadline that passed on September 21. Under CISA BOD 26-04, a 3-day window applies to CVE-2025-39682 across all assets, and for the other two, the deadline is 3 days for publicly exposed assets and 14 days for internal assets. With the September 21 deadline now passed, affected systems should be patched immediately. Qualys TruRisk Eliminate identifies affected assets with vulnerability context a
Hackernews
CISA Flags Three Linux Kernel Vulnerabilities Exploited in the Wild
blogs_hackernews·2026-09-19·CVSS 7.1
CVE-2025-39682 [HIGH] CISA Flags Three Linux Kernel Vulnerabilities Exploited in the Wild
Home
Threat Intelligence
Vulnerabilities
Cyber Attacks
Webinars
Expert Insights
Awards
Webinars
Awards
Free eBooks
About THN
Jobs
Advertise with us
## CISA Flags Three Linux Kernel Vulnerabilities Exploited in the Wild
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Friday added three security flaws impacting the Linux kernel to its Known Exploited Vulnerabilities ( KEV ) catalog, citing evidence of active exploitation.
The vulnerabilities are listed below -
CVE-2025-39682 (CVSS score: 9.8) - An improper check for unusual or exceptional conditions vulnerability in the TLS receive path that could allow local authenticated users to trigger memory disclosure or denial-of-service (DoS).
CVE-2026-53266 (CVSS score: 8.8) - An out-of-bounds write vulnerabili
https://git.kernel.org/stable/c/2902c3ebcca52ca845c03182000e8d71d3a5196fhttps://git.kernel.org/stable/c/29c0ce3c8cdb6dc5d61139c937f34cb888a6f42ehttps://git.kernel.org/stable/c/3439c15ae91a517cf3c650ea15a8987699416ad9https://git.kernel.org/stable/c/62708b9452f8eb77513115b17c4f8d1a22ebf843https://git.kernel.org/stable/c/c09dd3773b5950e9cfb6c9b9a5f6e36d06c62677https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlhttps://cert-portal.siemens.com/productcert/html/ssa-032379.htmlhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-39682
2025-09-05
Published
2026-09-18
Added to CISA KEV
Exploited in the wild