CVE-2021-3847: Fedoraproject Fedora

High severity, CVSS 7.8. EPSS: 0.5% chance of exploitation in the next 30 days.

An unauthorized access to the execution of the setuid file with capabilities flaw in the Linux kernel OverlayFS subsystem was found in the way user copying a capable file from a nosuid mount into another mount. A local user could use this flaw to escalate their privileges on the system.

Affected products

• Fedoraproject Fedora: version 34 only
• Linux Linux Kernel: up to and including 5.17.0

Published 2022-04-01. Last modified 2026-06-17.