CVE-2026-64340

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")

References

• https://git.kernel.org/stable/c/0b57e5ddbd89df3bc367463de3d2ca66f99a1a5e
• https://git.kernel.org/stable/c/11d069f85851997b4ea0adf242ed9672dc749b8f
• https://git.kernel.org/stable/c/62fc8eb1b1481051f7bab4aa93d79809053dd09f
• https://git.kernel.org/stable/c/6462de75d2e370c7e74dcfb7b4ae79eb5a6a55ee
• https://git.kernel.org/stable/c/766738ecf2b819e54d38763c8d1c8ae6cff14b39