CVE-2021-3406: Fedoraproject Fedora

Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days.

A flaw was found in keylime 5.8.1 and older. The issue in the Keylime agent and registrar code invalidates the cryptographic chain of trust from the Endorsement Key certificate to agent attestations.

Affected products

• Fedoraproject Fedora: version 34 only
• Keylime Keylime: up to and including 5.8.1

Published 2021-02-25. Last modified 2026-06-17.