RHSA-2026:75580HighCVSS 7.8

Red Hat Security Advisory: sudo security update

Published
October 5, 2026
Last Modified
October 5, 2026

🔗 CVE IDs covered (1)

CVE-2026-96512 →

📋 Description

CVE-2026-96512 — sudo: sudo: TZ environment variable allows bypass of NOTBEFORE/NOTAFTER time-based authorization

🎯 Affected products14

  • Red Hat Enterprise Linux BaseOS (v. 8)
  • sudo-0:1.9.5p2-2.el8_10.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • sudo-0:1.9.5p2-2.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • sudo-0:1.9.5p2-2.el8_10.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • sudo-0:1.9.5p2-2.el8_10.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • sudo-0:1.9.5p2-2.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • sudo-debuginfo-0:1.9.5p2-2.el8_10.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • sudo-debuginfo-0:1.9.5p2-2.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • sudo-debuginfo-0:1.9.5p2-2.el8_10.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • sudo-debuginfo-0:1.9.5p2-2.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • sudo-debugsource-0:1.9.5p2-2.el8_10.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • sudo-debugsource-0:1.9.5p2-2.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • sudo-debugsource-0:1.9.5p2-2.el8_10.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • sudo-debugsource-0:1.9.5p2-2.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: Append the 'Z' timezone suffix to all NOTBEFORE and NOTAFTER timestamps in sudoers rules. For example, change 'NOTAFTER=20261231235959' to 'NOTAFTER=20261231235959Z'. Timestamps with the 'Z' suffix are interpreted as UTC via timegm() and are not affected by the TZ environment variable. Administrators can audit their sudoers configuration with: grep -rE 'NOT(BEFORE|AFTER)=' /etc/sudoers /etc/sudoers.d/ and verify that all timestamps end with 'Z'.

🔗 References (4)