CVE-2026-52977

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

Description A race condition exists during signal or timeout wakeup in the futex subsystem. When one task is performing a wait-requeue-pi operation and another is performing a requeue-PI operation, a deadlock can occur. Specifically, if a task attempts to leave the queue early due to a timeout or signal, it may block while waiting for a lock held by another task. If the second task has a higher priority, it may enter a busy loop attempting to make progress, resulting in a system livelock. This issue involves the futex requeue pi prepare() function and the handle early requeue pi wakeup() function.

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