A AegiFlow
UNKNOWNKNOWN EXPLOITED

CVE-2021-3493

Linux Kernel Privilege Escalation Vulnerability

Published
2022-10-20
Modified
2026-07-31
Sources
cisa-kev

Summary

The overlayfs stacking file system in Linux kernel does not properly validate the application of file capabilities against user namespaces, which could lead to privilege escalation.

References

Includes data from the CISA Known Exploited Vulnerabilities catalog.

CVE® is a registered trademark of The MITRE Corporation. CVE content reproduced under the CVE Terms of Use; copyright designation © MITRE.