CVE-2026-6420

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.

Database specific

{
    "cna_assigner": "redhat",
    "cwe_ids": [
        "CWE-1241"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/6xxx/CVE-2026-6420.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "range": [
                        {
                            "fixed": "0:7.14.1-5.el10_2.1"
                        }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "InverseAffectedRanges"
                }
            ]
        }
    ]
}

References

Affected packages

Git / github.com/keylime/keylime

Affected ranges

Type

GIT

Repo

https://github.com/keylime/keylime

Events

Introduced

fc5f04c145beb9c57b12862fd22e8d3bf47fb501

Fixed

9ecfa74ae10953d33e0cd88c4752232b1eca7202

Database specific

Show details

{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "7.14.0"
                },
                {
                    "fixed": "7.14.2"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        }
    ]
}

Affected versions

v7.*

v7.14.0

v7.14.1

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-6420.json"