CVE-2026-6420

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Source
https://cve.org/CVERecord?id=CVE-2026-6420
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-6420.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-6420
Aliases
Downstream
Related
Published
2026-05-06T10:19:39.121Z
Modified
2026-08-28T11:30:42.676252532Z
Severity
  • 6.3 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L CVSS Calculator
Summary
Keylime: keylime: security bypass due to hardcoded tpm quote nonce
Details

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 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/6xxx/CVE-2026-6420.json",
    "cwe_ids": [
        "CWE-1241"
    ],
    "cna_assigner": "redhat"
}
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 
{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "7.14.0"
        },
        {
            "fixed": "7.14.2"
        }
    ]
}

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"