CVE-2026-89767

A flaw was found in the Linux kernel's overlay file system (overlayfs). An unprivileged local user can trigger a specific error condition during the creation of a new directory. This error causes the system to incorrectly release a lock on the parent directory and a reference to the new directory entry twice. This double release can lead to subsequent attempts to create directories under the same parent to become unresponsive, effectively causing a denial of service (DoS) for those operations.

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.