CVE-2026-6420

May 6, 2026, 11:16 a.m.

6.3
Medium

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.

Product(s) Impacted

Vendor Product Versions
Keylime
  • Keylime
  • *

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-1241
Use of Predictable Algorithm in Random Number Generator
The device uses an algorithm that is predictable and generates a pseudo-random number.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a keylime keylime / / / / / / / /

References

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

Tags

[email protected]
CWE-1241
2026-05-06
CVE-2026-6420

CVSS Score

6.3 / 10

CVSS Data - 3.1

  • Attack Vector: LOCAL
  • Attack Complexity: LOW
  • Privileges Required: HIGH
  • Scope: UNCHANGED
  • Confidentiality Impact: HIGH
  • Integrity Impact: HIGH
  • Availability Impact: LOW

    • CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L

    View Vector String

Timeline

Published: May 6, 2026, 11:16 a.m.
Last Modified: May 6, 2026, 11:16 a.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

[email protected]

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.