CVE-2013-1957: Linux Kernel

Medium severity, CVSS 4.7. EPSS: 0.3% chance of exploitation in the next 30 days.

The clone_mnt function in fs/namespace.c in the Linux kernel before 3.8.6 does not properly restrict changes to the MNT_READONLY flag, which allows local users to bypass an intended read-only property of a filesystem by leveraging a separate mount namespace.

Affected products

• Linux Linux Kernel: up to and including 3.8.5; version 3.8.0 only; version 3.8.1 only; version 3.8.2 only; version 3.8.3 only; version 3.8.4 only

Published 2013-04-24. Last modified 2026-06-16.