RHSA-2026:66287MediumCVSS 5.5

Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Published
September 10, 2026
Last Modified
October 29, 2026

🔗 CVE IDs covered (2)

CVE-2026-4897 →CVE-2026-85498 →

📋 Description

CVE-2026-4897 — polkit: Polkit: Denial of Service via unbounded input processing through standard input CVE-2026-85498 — polkit: Regression in CVE-2026-4897 fix (polkit read_cookie()) - stack buffer underflow

🎯 Affected products10

  • Red Hat Hardened Images
  • polkit-0:127-5.1.hum1@aarch64 as a component of Red Hat Hardened Images
  • polkit-0:127-5.1.hum1@src as a component of Red Hat Hardened Images
  • polkit-0:127-5.1.hum1@x86_64 as a component of Red Hat Hardened Images
  • polkit-devel-0:127-5.1.hum1@aarch64 as a component of Red Hat Hardened Images
  • polkit-devel-0:127-5.1.hum1@x86_64 as a component of Red Hat Hardened Images
  • polkit-docs-0:127-5.1.hum1@noarch@public-hummingbird-aarch64-rpms as a component of Red Hat Hardened Images
  • polkit-docs-0:127-5.1.hum1@noarch@public-hummingbird-x86_64-rpms as a component of Red Hat Hardened Images
  • polkit-libs-0:127-5.1.hum1@aarch64 as a component of Red Hat Hardened Images
  • polkit-libs-0:127-5.1.hum1@x86_64 as a component of Red Hat Hardened Images

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/ Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. Workaround: Mitigation for this issue is either not available or the currently available options do not meet the criteria for a mitigation as defined by the Red Hat Product Security team. This flaw remains subject to future review as new information becomes available. Exposure is limited: the defect is reachable only by a local/adjacent low-privileged user interacting with the polkit authentication agent and results at most in a crash (availability) of the affected process.

🔗 References (6)