CVE-2026-6420 — Keylime: keylime: security bypass due to hardcoded tpm quote nonce
A flaw was found in Keylime. An attacker with root access on an enrolled monitored machine, where the Keylime agent runs, can exploit a vulnerability in the Keylime verifier. Th…
Published: 2026-05-06 · CVSS: 6.3 · CVSS 3.1
A flaw was found in Keylime. An attacker with root access on an enrolled monitored machine, where the Keylime agent runs, can exploit a vulnerability in the Keylime verifier. The verifier uses a hardcoded challenge nonce for Trusted Platform Module (TPM) quote attestation instead of a cryptographically random value. This allows the attacker to stockpile valid TPM quotes and replay them to evade detection after compromising the system. This issue affects only the push model deployment.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7