CVE-2026-64340
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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")
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.13% probability · 2th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS 0.1% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.