CVE-2025-38461

vsock: Fix transport_* TOCTOU

MEDIUM

4.7

CVSS Score

Published: July 25, 2025 at 03:27 PM UTC

Updated: August 5, 2026 at 12:44 PM UTC

2 products affected across 2 vendorsLinux KernelDebian Linux

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Severity

MEDIUM4.7

Exploit prediction

EPSS 0.1%

SSVC

No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: vsock: Fix transport_* TOCTOU Transport assignment may race with module unload. Protect new_transport from becoming a stale pointer. This also takes care of an insecure call in vsock_use_local_transport(); add a lockdep assert. BUG: unable to handle page fault for address: fffffbfff8056000 Oops: Oops: 0000 [#1] SMP KASAN RIP: 0010:vsock_assign_transport+0x366/0x600 Call Trace: vsock_connect+0x59c/0xc40 __sys_connect+0xe8/0x100 __x64_sys_connect+0x6e/0xc0 do_syscall_64+0x92/0x1c0 entry_SYSCALL_64_after_hwframe+0x4b/0x53

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux · Debiandrupal

95%

11.0

Linux Kernel · Linux

95%

5.11 ≤ v < 5.15.1895.16 ≤ v < 6.1.1465.5 ≤ v < 5.10.2405.5 ≤ v < 5.15.1895.5 ≤ v < 6.1.1465.5 ≤ v < 6.12.395.5 ≤ v < 6.15.75.5 ≤ v < 6.165.5 ≤ v < 6.6.996.13 ≤ v < 6.15.76.2 ≤ v < 6.6.996.7 ≤ v < 6.12.396.16 rc1 6.16 rc2 6.16 rc3 6.16 rc4 6.16 rc5c0cfa2d8a788fcf45df5bf4070ab2474c88d543a

Vendor states this is fixed in 36a439049b34cca0b3661276049b84a1f76cc21a (fixed)

Vendor states this is fixed in 687aa0c5581b8d4aa87fd92973e4ee576b550cdf (fixed)

Vendor states this is fixed in 7b73bddf54777fb62d4d8c7729d0affe6df04477 (fixed)

Vendor states this is fixed in 8667e8d0eb46bc54fdae30ba2f4786407d3d88eb (fixed)

Vendor states this is fixed in 9ce53e744f18e73059d3124070e960f3aa9902bf (fixed)

Vendor states this is fixed in 9d24bb6780282b0255b9929abe5e8f98007e2c6e (fixed)

Vendor states this is fixed in ae2c712ba39c7007de63cb0c75b51ce1caaf1da5 (fixed)

Vendor states this is fixed in 5.10.240 (unaffected)

Vendor states this is fixed in 5.15.189 (unaffected)

Vendor states this is fixed in 5.5 (unaffected)

Vendor states this is fixed in 6.1.146 (unaffected)

Vendor states this is fixed in 6.12.39 (unaffected)