CVE-2021-3732: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.4% chance of exploitation in the next 30 days.

A flaw was found in the Linux kernel's OverlayFS subsystem in the way the user mounts the TmpFS filesystem with OverlayFS. This flaw allows a local user to gain access to hidden files that should not be accessible.

Affected products

• Linux Linux Kernel: before 5.14 (fixed in 5.14); version 5.14 only

Published 2022-03-10. Last modified 2026-06-17.