CVE-2026-31609
published 2026-04-24CVE-2026-31609: In the Linux kernel, the following vulnerability has been resolved: smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()…
PriorityP345critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.46%
36.8th percentile
In the Linux kernel, the following vulnerability has been resolved:
smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()
smbd_send_batch_flush() already calls smbd_free_send_io(),
so we should not call it again after smbd_post_send()
moved it to the batch list.
Affected
19 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= 21538121efe6c8c5b51c742fa02cbe820bc48714 < f9a162c2bbcd0ac85bd07c5b37cf20286048b65c | f9a162c2bbcd0ac85bd07c5b37cf20286048b65c |
| linux | linux | >= 21538121efe6c8c5b51c742fa02cbe820bc48714 < 27b7c3e916218b5eb2ee350211140e961bfc49be | 27b7c3e916218b5eb2ee350211140e961bfc49be |
| linux | linux | >= 37b5c06956183b65e6808b509cf637632016cdf7 < 22b7c1c619d808aec4cad3dc42103345e370d107 | 22b7c1c619d808aec4cad3dc42103345e370d107 |
| linux | linux | >= 6.18.11 < 6.18.24 | 6.18.24 |
| linux | linux | >= 6.19.1 < 6.19.14 | 6.19.14 |
| linux | linux | >= cca0526ef2344cab6944d7f441fc24e152da031b < a9940dcbe5cb92482c04efc7341039ddf7dbf607 | a9940dcbe5cb92482c04efc7341039ddf7dbf607 |
| linux | linux_kernel | < 6.18.24 | 6.18.24 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 6.19 < 6.19.14 | 6.19.14 |
| linux | linux_kernel | >= 7.0 < 7.0.1 | 7.0.1 |
| ubuntu | linux | — | — |
| ubuntu | linux-aws | — | — |
| ubuntu | linux-gcp | — | — |
| ubuntu | linux-ibm | — | — |
| ubuntu | linux-nvidia | — | — |
| ubuntu | linux-oracle | — | — |
| ubuntu | linux-raspi | — | — |
| ubuntu | linux-realtime | — | — |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vendor_redhat7.0MEDIUM
vendor_ubuntu2.0LOW
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Ubuntu
Linux kernel (NVIDIA) vulnerabilities
vendor_ubuntu·2026-07-06·CVSS 2.0
CVE-2026-46009 [LOW] Linux kernel (NVIDIA) vulnerabilities
Title: Linux kernel (NVIDIA) 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)
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;
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- Rados block device (RBD) driver;
- Compressed RAM block device driver;
- Character device driver;
- TPM device driver;
- Hardware crypto device drivers;
- EDAC drivers;
- GPU drivers;
- Greybus drive
Ubuntu
Linux kernel (Raspberry Pi) vulnerabilities
vendor_ubuntu·2026-07-02·CVSS 2.0
CVE-2026-46316 [LOW] Linux kernel (Raspberry Pi) vulnerabilities
Title: Linux kernel (Raspberry Pi) 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)
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;
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- Rados block device (RBD) driver;
- Compressed RAM block device driver;
- Character device driver;
- TPM device driver;
- Hardware crypto device drivers;
- EDAC drivers;
- GPU drivers;
- Greybus
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2026-07-01·CVSS 2.0
CVE-2026-46042 [LOW] Linux kernel vulnerabilities
Title: Linux kernel 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)
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;
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- Rados block device (RBD) driver;
- Compressed RAM block device driver;
- Character device driver;
- TPM device driver;
- Hardware crypto device drivers;
- EDAC drivers;
- GPU drivers;
- Greybus drivers;
- HID
Red Hat
kernel: smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()
vendor_redhat·2026-04-24·CVSS 7.0
CVE-2026-31609 [MEDIUM] CWE-1341 kernel: smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()
kernel: smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()
A flaw was found in the Linux kernel's Server Message Block (SMB) client. This vulnerability, a double-free, occurs in the `smbd_free_send_io()` function after `smbd_send_batch_flush()` has already freed the memory. This memory corruption can lead to a denial of service (DoS) for the affected system.
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) - Affected
Package: kernel-rt (Red Hat Enterprise Linux 8) - Affected
Package: kernel (Red Hat Enterprise Linux 9
GHSA
GHSA-rc8c-94m4-frfh: In the Linux kernel, the following vulnerability has been resolved:
smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush
ghsa_unreviewed·2026-04-24
CVE-2026-31609 GHSA-rc8c-94m4-frfh: In the Linux kernel, the following vulnerability has been resolved:
smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush
In the Linux kernel, the following vulnerability has been resolved:
smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()
smbd_send_batch_flush() already calls smbd_free_send_io(),
so we should not call it again after smbd_post_send()
moved it to the batch list.
No detection rules found.
No public exploits indexed.
2026-04-24
Published