CVE-2026-98986

A flaw was found in the Linux kernel's mount namespace subsystem. When cleaning up a mount namespace associated with filesystem notification marks, the kernel improperly attempts to acquire a sleeping lock within an invalid interrupt context. A local user with privileges to manage mount namespaces could exploit this flaw by attaching a notification mark to a namespace and exiting the process, resulting in a system crash and 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.