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No exploitation reportedFix available

CVE-2026-6420

No exploitation reported by the sources we read.

  • Published2026-05-06
  • Fixed in7.14.2
  • WeaknessCWE-1241

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2026-05-0611:16CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-6420?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-6420?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

OSV
keylime
BranchAffectedFixed in
7.14≥ 7.14.0, < 7.14.27.14.2

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • keylimeAlmaLinux:10all versions · fixed in 7.14.1-5.el10_2.1and 7 other packages

Full record on NVD

Fix

  1. Update keylime to 7.14.2

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVE recordread 2026-10-23
  • CISA-ADPSSVC decisionnone2026-05-06
  • OpenCVESSVC decisionnone—
  • CNACVSS 3.16.3read 2026-10-23
  • CNAweakness (CWE)CWE-1241read 2026-10-23
  • FIRST EPSSEPSS score0.2 %2026-10-23
  • OSVaffected packages—

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L
Published
2026-05-06
Last Modified
2026-08-26
NVD status
Awaiting Analysis

Frequently asked questions

What is 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.

Is CVE-2026-6420 actively exploited?

Active exploitation of CVE-2026-6420 has not been confirmed. Its EPSS score was 0.2% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-6420?

CVE-2026-6420 has a CVSS v3 base score of 6.3 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L.

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