CVE-2026-45972
published 2026-05-27CVE-2026-45972: In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF and double free in smb2_open_file() Zero out @err_iov and…
PriorityP344critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.33%
25.9th percentile
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix potential UAF and double free in smb2_open_file()
Zero out @err_iov and @err_buftype before retrying SMB2_open() to
prevent an UAF bug if @data != NULL, otherwise a double free.
Affected
48 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= 3a6d6b332f92990958602c1e35ce0173e2dd62e9 < 7425453ea16dbc3bbb0f6cac4d60b537e5e4d151 | 7425453ea16dbc3bbb0f6cac4d60b537e5e4d151 |
| linux | linux | >= 6.1.163 < 6.1.165 | 6.1.165 |
| linux | linux | >= 6.12.70 < 6.12.75 | 6.12.75 |
| linux | linux | >= 6.18.10 < 6.18.14 | 6.18.14 |
| linux | linux | >= 6.6.124 < 6.6.128 | 6.6.128 |
| linux | linux | >= 743f70406264348c0830f38409eb6c40a42fb2db < 96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74 | 96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74 |
| linux | linux | >= 9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5 < e66dcf7bb9c4df5582c82bc3582725abcbfbea73 | e66dcf7bb9c4df5582c82bc3582725abcbfbea73 |
| linux | linux | >= b64e3b5d8d759dd4333992e4ba4dadf9359952c8 < 4d339b219004869e96c4ce56b8891f83a38da4c0 | 4d339b219004869e96c4ce56b8891f83a38da4c0 |
| linux | linux | >= e3a43633023e3cacaca60d4b8972d084a2b06236 < 639deb962986ef2f5e2a6d5a600c66f922471e81 | 639deb962986ef2f5e2a6d5a600c66f922471e81 |
| linux | linux | >= e3a43633023e3cacaca60d4b8972d084a2b06236 < ebbbc4bfad4cb355d17c671223d0814ee3ef4eda | ebbbc4bfad4cb355d17c671223d0814ee3ef4eda |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 6.1.163 < 6.1.165 | 6.1.165 |
| linux | linux_kernel | >= 6.12.70 < 6.12.75 | 6.12.75 |
| linux | linux_kernel | >= 6.18.10 < 6.18.14 | 6.18.14 |
| linux | linux_kernel | >= 6.19.1 < 6.19.4 | 6.19.4 |
| linux | linux_kernel | >= 6.6.124 < 6.6.128 | 6.6.128 |
| ubuntu | linux | — | — |
| ubuntu | linux-aws | — | — |
| ubuntu | linux-aws-6.8 | — | — |
| ubuntu | linux-aws-fips | — | — |
| ubuntu | linux-azure | — | — |
| ubuntu | linux-azure-6.8 | — | — |
| ubuntu | linux-azure-fde | — | — |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vendor_ubuntu8.8HIGH
vendor_redhat7.0HIGH
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Ubuntu
Linux kernel (HWE) vulnerabilities
vendor_ubuntu·2026-07-28·CVSS 2.0
CVE-2026-46073 [LOW] Linux kernel (HWE) vulnerabilities
Title: Linux kernel (HWE) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some AMD processors did not properly clear data in
the floating point divider unit during speculative execution. A local
attacker could use this to expose sensitive information. (CVE-2025-54505)
It was discovered that some AMD Zen 2 processors did not properly isolate
shared resources in the operation cache. A local attacker could possibly
use this issue to corrupt instructions executed at a higher privilege
level, resulting in privilege escalation. (CVE-2025-54518)
It was discovered that some AMD Zen 5 processors supporting RDSEED
instruction did not properly handle entropy, potentially resulting in the
consumption of insufficiently random values. A local a
Ubuntu
Linux kernel (Azure CVM) vulnerabilities
vendor_ubuntu·2026-07-24·CVSS 2.0
CVE-2026-46073 [LOW] Linux kernel (Azure CVM) vulnerabilities
Title: Linux kernel (Azure CVM) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some AMD processors did not properly clear data in
the floating point divider unit during speculative execution. A local
attacker could use this to expose sensitive information. (CVE-2025-54505)
It was discovered that some AMD Zen 2 processors did not properly isolate
shared resources in the operation cache. A local attacker could possibly
use this issue to corrupt instructions executed at a higher privilege
level, resulting in privilege escalation. (CVE-2025-54518)
It was discovered that some AMD Zen 5 processors supporting RDSEED
instruction did not properly handle entropy, potentially resulting in the
consumption of insufficiently random values. A l
Ubuntu
Linux kernel (Azure CVM) vulnerabilities
vendor_ubuntu·2026-07-24·CVSS 2.0
CVE-2026-43129 [LOW] Linux kernel (Azure CVM) vulnerabilities
Title: Linux kernel (Azure CVM) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some AMD processors did not properly clear data in
the floating point divider unit during speculative execution. A local
attacker could use this to expose sensitive information. (CVE-2025-54505)
It was discovered that some AMD Zen 2 processors did not properly isolate
shared resources in the operation cache. A local attacker could possibly
use this issue to corrupt instructions executed at a higher privilege
level, resulting in privilege escalation. (CVE-2025-54518)
It was discovered that some AMD Zen 5 processors supporting RDSEED
instruction did not properly handle entropy, potentially resulting in the
consumption of insufficiently random values. A l
Ubuntu
Linux kernel (Azure) vulnerabilities
vendor_ubuntu·2026-07-24·CVSS 2.0
CVE-2026-46073 [LOW] Linux kernel (Azure) vulnerabilities
Title: Linux kernel (Azure) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some AMD processors did not properly clear data in
the floating point divider unit during speculative execution. A local
attacker could use this to expose sensitive information. (CVE-2025-54505)
It was discovered that some AMD Zen 2 processors did not properly isolate
shared resources in the operation cache. A local attacker could possibly
use this issue to corrupt instructions executed at a higher privilege
level, resulting in privilege escalation. (CVE-2025-54518)
It was discovered that some AMD Zen 5 processors supporting RDSEED
instruction did not properly handle entropy, potentially resulting in the
consumption of insufficiently random values. A local
Ubuntu
Linux kernel (FIPS) vulnerabilities
vendor_ubuntu·2026-07-10
CVE-2025-71235 Linux kernel (FIPS) vulnerabilities
Title: Linux kernel (FIPS) 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;
- MIPS architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- ACPI drivers;
- ATM drivers;
- RNBD block device driver;
- Ublk userspace block driver;
- Bus devices;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- Clocksource drivers;
- CPU idle management framework;
- Hardware crypto device drivers;
- DMA engine subsystem;
- EFI core;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- Hardware monito
Ubuntu
Linux kernel (Raspberry Pi) vulnerabilities
vendor_ubuntu·2026-07-09
CVE-2026-45960 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;
- MIPS architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- ACPI drivers;
- ATM drivers;
- RNBD block device driver;
- Ublk userspace block driver;
- Bus devices;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- Clocksource drivers;
- CPU idle management framework;
- Hardware crypto device drivers;
- DMA engine subsystem;
- EFI core;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- Hardwar
Ubuntu
Linux kernel (Raspberry Pi Real-time) vulnerabilities
vendor_ubuntu·2026-07-06
CVE-2026-43314 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;
- MIPS architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- ACPI drivers;
- ATM drivers;
- RNBD block device driver;
- Ublk userspace block driver;
- Bus devices;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- Clocksource drivers;
- CPU idle management framework;
- Hardware crypto device drivers;
- DMA engine subsystem;
- EFI core;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2026-07-02
CVE-2026-43314 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;
- MIPS architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- ACPI drivers;
- ATM drivers;
- RNBD block device driver;
- Ublk userspace block driver;
- Bus devices;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- Clocksource drivers;
- CPU idle management framework;
- Hardware crypto device drivers;
- DMA engine subsystem;
- EFI core;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- Hardware monitoring dr
Ubuntu
Linux kernel (Low Latency) vulnerabilities
vendor_ubuntu·2026-07-02·CVSS 8.8
CVE-2026-43314 [HIGH] Linux kernel (Low Latency) vulnerabilities
Title: Linux kernel (Low Latency) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that the Linux kernel did not properly handle shared page
fragments during socket buffer operations, collectively known as Dirty
Frag. A logic flaw existed in the XFRM ESP-in-TCP subsystem and in the
RxRPC networking subsystem when processing paged fragments. A local
attacker could use this to escalate privileges, or possibly escape a
container. (CVE-2026-43284, CVE-2026-43500, CVE-2026-45998, CVE-2026-46000)
It was discovered that a logic flaw existed in the XFRM ESP-in-TCP
subsystem in the Linux kernel when handling socket buffer fragments. This
flaw is known as Fragnesia. A local attacker could use this to escalate
privileges, or possibly escape a conta
Ubuntu
Linux kernel (NVIDIA Tegra) vulnerabilities
vendor_ubuntu·2026-07-02
CVE-2026-43314 Linux kernel (NVIDIA Tegra) vulnerabilities
Title: Linux kernel (NVIDIA Tegra) 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;
- MIPS architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- ACPI drivers;
- ATM drivers;
- RNBD block device driver;
- Ublk userspace block driver;
- Bus devices;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- Clocksource drivers;
- CPU idle management framework;
- Hardware crypto device drivers;
- DMA engine subsystem;
- EFI core;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- Hardwar
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2026-07-01
CVE-2026-43226 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;
- MIPS architecture;
- PowerPC architecture;
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- ACPI drivers;
- ATM drivers;
- RNBD block device driver;
- Ublk userspace block driver;
- Bus devices;
- Character device driver;
- TPM device driver;
- Clock framework and drivers;
- Clocksource drivers;
- CPU idle management framework;
- Hardware crypto device drivers;
- DMA engine subsystem;
- EFI core;
- GPIO subsystem;
- GPU drivers;
- HID subsystem;
- Hardware monitoring dr
Red Hat
kernel: smb: client: fix potential UAF and double free in smb2_open_file()
vendor_redhat·2026-05-27·CVSS 7.0
CVE-2026-45972 [HIGH] CWE-825 kernel: smb: client: fix potential UAF and double free in smb2_open_file()
kernel: smb: client: fix potential UAF and double free in smb2_open_file()
A flaw was found in the Linux kernel's Server Message Block (SMB) client. This vulnerability, within the `smb2_open_file()` function, could allow an attacker to cause memory corruption due to improper handling of memory during file open operations. This could lead to system instability or potentially enable an attacker to execute arbitrary code.
Package: kernel (Red Hat Enterprise Linux 10) - Affected
Package: kernel (Red Hat Enterprise Linux 6) - Not affected
Package: kernel (Red Hat Enterprise Linux 7) - Not affected
Package: kernel-rt (Red Hat Enterprise Linux 7) - Not affected
Package: kernel (Red Hat Enterprise Linux 8) - Not affected
Package: kernel-rt (Red Hat Enterprise Linux 8) - Not affected
Packag
GHSA
GHSA-6w7x-q46j-6x9r: In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix potential UAF and double free in smb2_open_file()
Zero out @err
ghsa_unreviewed·2026-05-27
CVE-2026-45972 GHSA-6w7x-q46j-6x9r: In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix potential UAF and double free in smb2_open_file()
Zero out @err
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix potential UAF and double free in smb2_open_file()
Zero out @err_iov and @err_buftype before retrying SMB2_open() to
prevent an UAF bug if @data != NULL, otherwise a double free.
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/4d339b219004869e96c4ce56b8891f83a38da4c0https://git.kernel.org/stable/c/639deb962986ef2f5e2a6d5a600c66f922471e81https://git.kernel.org/stable/c/7425453ea16dbc3bbb0f6cac4d60b537e5e4d151https://git.kernel.org/stable/c/96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74https://git.kernel.org/stable/c/e66dcf7bb9c4df5582c82bc3582725abcbfbea73https://git.kernel.org/stable/c/ebbbc4bfad4cb355d17c671223d0814ee3ef4edahttps://access.redhat.com/security/cve/CVE-2026-45972https://bugzilla.redhat.com/show_bug.cgi?id=2481973https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45972.json
2026-05-27
Published