Vulnerability in Keylime Verifier Affects Red Hat's Trusted Platform Module
CVE-2026-6420

6.3MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 9
Vendor
CVE Published:
6 May 2026

What is CVE-2026-6420?

A security issue has been identified in the Keylime verifier component, where it improperly utilizes a hardcoded challenge nonce for Trusted Platform Module (TPM) quote attestation, instead of a cryptographically secure random value. This flaw allows an attacker with root privileges on a monitored system to collect valid TPM quotes and replay them at a later time, effectively evading detection and compromising system integrity. This vulnerability specifically impacts deployments utilizing the push model.

References

https://access.redhat.com/security/cve/CVE-2026-6420
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2458889
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
6.3
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Keylime developers for reporting this issue.
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