Description
In the Linux kernel, the following vulnerability has been resolved:
USB: ldusb: 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 | >= ce0d7d3f575fc1ba6a89c3c651e710355590daff, < fc55923a972e715f9a27187b47d4920709e23d85; >= ce0d7d3f575fc1ba6a89c3c651e710355590daff, < e5a9bdce4bfd3e2226b5f3df5fb8385d6935ee69; >= ce0d7d3f575fc1ba6a89c3c651e710355590daff, < af59829e67e11ba2511a9f8e4b9111afc7d1f550; >= ce0d7d3f575fc1ba6a89c3c651e710355590daff, < 02ca08fff74cf9b0a3c4d2cacde1c6edeeb95bb4; >= ce0d7d3f575fc1ba6a89c3c651e710355590daff, < d8f69404e1d671326f86d378b9f5bfbd56490e9d; >= ce0d7d3f575fc1ba6a89c3c651e710355590daff, < 2107a4fc8ff1cf1d52f416c1e5cc8e97413a5915; >= ce0d7d3f575fc1ba6a89c3c651e710355590daff, < a3e794136ab5e3ad1e7019175a4b837aec86db4b; >= ce0d7d3f575fc1ba6a89c3c651e710355590daff, < 19bdfc7b3c179331eafa423d87e1336f43bbfeb8 |
| Linux | Linux | 2.6.26 |
References
- https://git.kernel.org/stable/c/02ca08fff74cf9b0a3c4d2cacde1c6edeeb95bb4Patch
- https://git.kernel.org/stable/c/19bdfc7b3c179331eafa423d87e1336f43bbfeb8Patch
- https://git.kernel.org/stable/c/2107a4fc8ff1cf1d52f416c1e5cc8e97413a5915Patch
- https://git.kernel.org/stable/c/a3e794136ab5e3ad1e7019175a4b837aec86db4bPatch
- https://git.kernel.org/stable/c/af59829e67e11ba2511a9f8e4b9111afc7d1f550Patch
- https://git.kernel.org/stable/c/d8f69404e1d671326f86d378b9f5bfbd56490e9dPatch
- https://git.kernel.org/stable/c/e5a9bdce4bfd3e2226b5f3df5fb8385d6935ee69Patch
- https://git.kernel.org/stable/c/fc55923a972e715f9a27187b47d4920709e23d85Patch
Timeline
- Published
- Jul 25, 2026
- Last modified
- Nov 6, 2026
- NVD status
- Analyzed