{"id":"CVE-2026-6420","title":"A flaw was found in Keylime","summary":"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 Plat…","severity":"medium","cvss":6.3,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L","cwe":["CWE-1241"],"published":"2026-05-06","updated":"2026-06-24","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-6420","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:28582","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-6420","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2458889","label":"secalert@redhat.com"}],"tags":["nvd"],"epss":0.00121,"epssPercentile":0.02189,"ingestedAt":"2026-06-29T13:24:34.837Z","slug":"CVE-2026-6420","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":35,"depthScoreParts":{"impact":34.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}