CVE-2026-98978

A flaw was found in the Linux kernel's mount namespace subsystem. This issue allows a local attacker to cause an information disclosure by exposing files and directories protected by locked mounts. When an unlocked ancestor mount is unmounted, the kernel improperly allows locked submounts to expire and unmount. Consequently, unauthorized users can gain visibility into covered filesystem contents that were intended to remain hidden.

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.