SB20260529163 - Fedora 44 update for keylime

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Main Vulnerability Database SB20260529163

SB20260529163 - Fedora 44 update for keylime

Published: May 29, 2026

Security Bulletin ID SB20260529163
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Not Using an Unpredictable IV with CBC Mode (CVE-ID: CVE-2026-6420)

CWE-ID: CWE-329 - Not Using an Unpredictable IV with CBC Mode

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local privileged user to bypass attestation freshness checks via replay attacks.

The vulnerability exists due to generation of a predictable nonce in CertificationParameters.generate_challenge() when generating attestation challenges in the push attestation protocol. A local privileged user can replay previously captured valid TPM quotes to bypass attestation freshness checks via replay attacks.

The issue is limited to a single enrolled agent node, and the pull-mode attestation path is not affected.


Remediation

Install update from vendor's website.

References