CVE-2021-3493.

Source-reported disclosure and enrichment record.

SEVERITY / CVSSUnscoredNo severity score in this snapshot.

EXPLOITATION STATUSCISA known exploitedAdded Oct 20, 2022

RECORD STATUSAwaiting NVD dataModified Oct 20, 2022

Disclosure 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.

CISA remediation guidance

Apply updates per vendor instructions.

Original records & references

NIST NVD record
CVE Program record
CISA KEV catalog entry

PUBLISHED 2022-10-20T00:00:00-04:00
MODIFIED 2022-10-20T00:00:00-04:00
INGESTED 2026-10-06T11:42:58-04:00