CVE-2026-74658

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A race condition exists in the robust futex implementation. When a robust futex is unlocked, it clears the FUTEX WAITERS bit and wakes a single waiter. If that woken waiter is killed before it can acquire the futex or re-arm the FUTEX WAITERS bit, and another task acquires the futex via the fast path, the notification is lost. Consequently, the new owner will not see the FUTEX WAITERS bit when unlocking, causing any remaining waiters to sleep indefinitely behind a free futex. This occurs because the implementation fails to maintain the consistency of the FUTEX WAITERS bit during specific exit sequences.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.