CVE-2026-31555

A flaw was found in the Linux kernel. A local user could exploit a race condition within the futex_lock_pi() retry path. This vulnerability occurs because a stale pointer to an exiting process is not cleared, leading to a kernel warning. Successful exploitation of this flaw could result in a system crash, causing a Denial of Service (DoS).

The futex PI lock retry path could follow a stale exiting pointer; upstream clears it before retrying. Red Hat documents this as a local kernel concurrency defect with availability impact. Fixes flow through standard kernel errata.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.