CVE-2025-38499

A vulnerability was found in clone_private_mount in fs/namespace.c in filesystem subsystem in the Linux Kernel.This flaw could allow a local attacker to crash the system or leak kernel internal information.

clone_private_mount() lacked a ns_capable(..., CAP_SYS_ADMIN) check for the user namespace that owns the target mount namespace. A local attacker in a user/mount namespace could privately clone a mount and expose content hidden by mounts they are not allowed to undo, effectively bypassing mount policy (confidentiality impact and sometimes integrity too). This CVE does not affect RHEL 9.6 and older RHEL 9 versions.

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.

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.