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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2026-96512

Sudo: sudo: tz environment variable allows bypass of notbefore/notafter time-based authorization

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Status
Published
Published
Updated
Assigning organization
redhat

Description

A flaw was found in sudo. When sudoers rules use NOTBEFORE or NOTAFTER time-based access restrictions with timestamps that omit the trailing 'Z' timezone indicator, the time evaluation relies on the TZ environment variable inherited from the calling user. Because sudo is a setuid-root program, an unprivileged local user can set TZ to an extreme timezone offset to shift the authorization window by up to approximately 25 hours, causing expired rules to be treated as valid. This allows the user to execute commands outside the intended time window. Authentication is not bypassed; only the time-based authorization check is affected.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Red Hat Red Hat Enterprise Linux 10

Default version status: affected

  • 0:1.9.17-10.p2.el10_2.7 to < *unaffected

Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support

Default version status: affected

  • 0:1.9.15-8.p5.el10_0.5 to < *unaffected

Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support

Default version status: affected

  • 0:1.8.23-10.el7_9.6 to < *unaffected

Red Hat Red Hat Enterprise Linux 8

Default version status: affected

  • 0:1.9.5p2-2.el8_10 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support

Default version status: affected

  • 0:1.8.29-7.el8_4.4 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Default version status: affected

  • 0:1.8.29-7.el8_4.4 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support

Default version status: affected

  • 0:1.9.5p2-1.el8_6.4 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

Default version status: affected

  • 0:1.9.5p2-1.el8_6.4 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Default version status: affected

  • 0:1.9.5p2-1.el8_8.4 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions

Default version status: affected

  • 0:1.9.5p2-1.el8_8.4 to < *unaffected

Red Hat Red Hat Enterprise Linux 9

Default version status: affected

  • 0:1.9.17p2-3.el9_8.3 to < *unaffected

Red Hat Red Hat Enterprise Linux 9

Default version status: affected

  • 0:1.9.17p2-3.el9_8.3 to < *unaffected

Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Default version status: affected

  • 0:1.9.5p2-9.el9_2.5 to < *unaffected

Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Default version status: affected

  • 0:1.9.5p2-10.el9_4.4 to < *unaffected

Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support

Default version status: affected

  • 0:1.9.5p2-10.el9_6.4 to < *unaffected

Red Hat Red Hat Hardened Images

Default version status: affected

  • 1.9.17-16.p2.2.hum1 to < *unaffected

Red Hat Red Hat OpenShift AI 3.0

Default version status: affected

  • 1793041981 to < *unaffected

Red Hat Red Hat OpenShift AI 3.4

Default version status: affected

  • 1793042006 to < *unaffected

Red Hat Red Hat OpenShift AI 3.4

Default version status: affected

  • 1793041995 to < *unaffected

Red Hat Red Hat Update Infrastructure 5

Default version status: affected

  • 1791964013 to < *unaffected

Red Hat Red Hat Update Infrastructure 5

Default version status: affected

  • 1791978693 to < *unaffected

References