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TI-2026-05635 Aliases CVE-2026-6420GHSA-q8w6-w55c-ccv5

Keylime: keylime: security bypass due to hardcoded tpm quote nonce

Priority LOW 29CWE-1241Published · Updated

Key facts

Attack vector
Local
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · Low
Fix status
Partial Red Hat: 1 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-294.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00121 1st percentileScored 2026-11-07
Fix Partial keylime: 7.14.2keylime (PyPI): 7.14.2Red Hat: 1 advisoryRed Hat: 1 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
—keylime7.14.0 to before 7.14.27.14.2Patch availableCNA
Red HatRed Hat Enterprise Linux 10—7.14.1-5.el10_2.1Patch availableCNA
Red HatRed Hat Enterprise Linux 9——No fix listedCNA
—keylime (PyPI)7.14.0 to before 7.14.27.14.2Patch availableGHSA-q8w6-w55c-ccv5
  • keylime Vendor— Affected 7.14.0 to before 7.14.2 Fixed in 7.14.2 Patch available CNA
  • Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in 7.14.1-5.el10_2.1 Patch available CNA
  • Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • keylime (PyPI) Vendor— Affected 7.14.0 to before 7.14.2 Fixed in 7.14.2 Patch available GHSA-q8w6-w55c-ccv5

CPE names CNA · 2

CPEVersionsRoleVendor
cpe:/o:redhat:enterprise_linux:10.210.2—Red Hat
cpe:/a:redhat:enterprise_linux:99—Red Hat
  • cpe:/o:redhat:enterprise_linux:10.2 Versions 10.2 — ·Red Hat
  • cpe:/a:redhat:enterprise_linux:9 Versions 9 — ·Red Hat

Remediation

  • Fix · CNA keylime Fixed in 7.14.2
  • Fix · GHSA-q8w6-w55c-ccv5 keylime (PyPI) Fixed in 7.14.2 Advisory →

Red Hat 1 advisory

  • RHSA-2026:28582 Released 2026-06-24 · Red Hat rating Moderate
    keylime security update
    • Red Hat Enterprise Linux AppStream (v. 10) keylime-7.14.1-5.el10_2.1, keylime-base-7.14.1-5.el10_2.1, keylime-registrar-7.14.1-5.el10_2.1 +5

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:28582

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-6420
  2. 2026-10-03 Alias added: GHSA-q8w6-w55c-ccv5

References

Advisory 2

Other 4

  • TI-2019-15875 Protection mechanism failure in Jenkins Pipeline: Groovy Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-15874 Protection mechanism failure in Jenkins Script Security Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
  • TI-2019-03949 Out-of-bounds write in ESXi and Horizon DaaS KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8
See all 7413 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences