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")
Metrics
CVSS 3.1 7.8/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 18bcbcfe9ca2308ebffb40068b51803da9315d97, < 11d069f85851997b4ea0adf242ed9672dc749b8f; >= 18bcbcfe9ca2308ebffb40068b51803da9315d97, < b4222c05066b252b451f9c8c4730b5b60824ea66; >= 18bcbcfe9ca2308ebffb40068b51803da9315d97, < 6462de75d2e370c7e74dcfb7b4ae79eb5a6a55ee; >= 18bcbcfe9ca2308ebffb40068b51803da9315d97, < 0b57e5ddbd89df3bc367463de3d2ca66f99a1a5e; >= 18bcbcfe9ca2308ebffb40068b51803da9315d97, < ab2bfd7bec4f134b377ec42f513e90c35db94160; >= 18bcbcfe9ca2308ebffb40068b51803da9315d97, < 766738ecf2b819e54d38763c8d1c8ae6cff14b39; >= 18bcbcfe9ca2308ebffb40068b51803da9315d97, < 9ba62966461a8e3cc593b62c56ec62eb2d80436d; >= 18bcbcfe9ca2308ebffb40068b51803da9315d97, < 62fc8eb1b1481051f7bab4aa93d79809053dd09f |
| Linux | Linux | 2.6.25 |
References
- https://git.kernel.org/stable/c/0b57e5ddbd89df3bc367463de3d2ca66f99a1a5ePatch
- https://git.kernel.org/stable/c/11d069f85851997b4ea0adf242ed9672dc749b8fPatch
- https://git.kernel.org/stable/c/62fc8eb1b1481051f7bab4aa93d79809053dd09fPatch
- https://git.kernel.org/stable/c/6462de75d2e370c7e74dcfb7b4ae79eb5a6a55eePatch
- https://git.kernel.org/stable/c/766738ecf2b819e54d38763c8d1c8ae6cff14b39Patch
- https://git.kernel.org/stable/c/9ba62966461a8e3cc593b62c56ec62eb2d80436dPatch
- https://git.kernel.org/stable/c/ab2bfd7bec4f134b377ec42f513e90c35db94160Patch
- https://git.kernel.org/stable/c/b4222c05066b252b451f9c8c4730b5b60824ea66Patch
Timeline
- Published
- Jul 25, 2026
- Last modified
- Nov 6, 2026
- NVD status
- Analyzed