Description
In the Linux kernel, the following vulnerability has been resolved: USB: legousbtower: fix use-after-free on disconnect race mutex_unlock() may access the mutex structure after releasing the lock and therefore cannot be used to manage lifetime of objects directly (unlike spinlocks and refcounts). [1][2] Use a kref to release the driver data to avoid use-after-free in mutex_unlock() when release() races with disconnect(). [1] a51749ab34d9 ("locking/mutex: Document that mutex_unlock() is non-atomic") [2] 2b9d9e0a9ba0 ("locking/mutex: Clarify that mutex_unlock(), and most other sleeping locks, can still use the lock object after it's unlocked")
Affected products
linux: linux kernel
References8
- git.kernel.org/stable/c/0b57e5ddbd89df3bc367463de3d2ca66f99a1a5e Patch
- git.kernel.org/stable/c/11d069f85851997b4ea0adf242ed9672dc749b8f Patch
- git.kernel.org/stable/c/62fc8eb1b1481051f7bab4aa93d79809053dd09f Patch
- git.kernel.org/stable/c/6462de75d2e370c7e74dcfb7b4ae79eb5a6a55ee Patch
- git.kernel.org/stable/c/766738ecf2b819e54d38763c8d1c8ae6cff14b39 Patch
- git.kernel.org/stable/c/9ba62966461a8e3cc593b62c56ec62eb2d80436d Patch
- git.kernel.org/stable/c/ab2bfd7bec4f134b377ec42f513e90c35db94160 Patch
- git.kernel.org/stable/c/b4222c05066b252b451f9c8c4730b5b60824ea66 Patch
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 2 · as of 14 November 2026
- CWE
- CWE-416
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