Vulnerability in Red Hat Enterprise Linux 10
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L.
EPSS exploit prediction
EPSS: 0.002 (6.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 6.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.001
Affected products
- Red Hat Enterprise Linux 10 — versions 0:7.14.1-5.el10_2.1
- Red Hat Enterprise Linux 9
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-6420 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
- access.redhat.com/errata/RHSA-2026:28582 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-6420?
- CVE-2026-6420 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under CWE-1241. CVSS score: 6.3/10. Published 2026-05-06.
- How severe is CVE-2026-6420?
- Medium severity. CVSS v3 base score is 6.3 out of 10.