CVE-2026-99256

A flaw was found in the Linux kernel's Device Mapper cache (dm-cache) subsystem. Improper lock ownership handling in the background work locking mechanism allows a lock to be released by a different process than the one that acquired it when suspending and resuming a cache device. A local user with administrative privileges could trigger this condition, leading to kernel locking inconsistencies and a potential Denial of Service (DoS).

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.