CVE-2026-64344

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

USB: idmouse: 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")

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References