CVE-2026-64343

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")

References

• https://git.kernel.org/stable/c/02ca08fff74cf9b0a3c4d2cacde1c6edeeb95bb4
• https://git.kernel.org/stable/c/19bdfc7b3c179331eafa423d87e1336f43bbfeb8
• https://git.kernel.org/stable/c/2107a4fc8ff1cf1d52f416c1e5cc8e97413a5915
• https://git.kernel.org/stable/c/a3e794136ab5e3ad1e7019175a4b837aec86db4b
• https://git.kernel.org/stable/c/af59829e67e11ba2511a9f8e4b9111afc7d1f550