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.

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 Platfo…

EPSS: 0.000 (3.8th percentile) — read the EPSS interpretation.

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.

Affected products

Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 9

Weakness classification (CWE)

CWE-1241

References

secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
RHBZ#2458889 (x_refsource_REDHAT, issue-tracking)

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.