Advisory severityHigh7.8Red Hat Linux Updated

High [CVE-2026-96512] TZ environment variable allows bypass of NOTBEFORE/NOTAFTER time-based authorization

This high-severity Red Hat Linux advisory covers CVE-2026-96512; related products: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 8.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-96512 Source published Sep 23, 2026Source updated Sep 23, 2026

VulniPulse record published Sep 23, 2026Record updated Oct 5, 2026

CVE-2026-96512

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Summary

TZ environment variable allows bypass of NOTBEFORE/NOTAFTER time-based authorization. Red Hat rates this important (CVSS 7.8).

Weakness: CWE-863. Red Hat lists fixing advisory RHSA-2026:75571 with package sudo-0:1.9.17-10.p2.el10_2.7, sudo-0:1.9.17p2-3.el9_8.3, sudo-main-1.9.17-16.p2.2.hum1, sudo-0:1.9.5p2-2.el8_10.

Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 8.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.

Official advisory · high-confidence parse· fetched 8 days ago·verify at source

Fixed versions

sudo-0:1.9.17-10.p2.el10_2.7
sudo-0:1.9.17p2-3.el9_8.3
sudo-main-1.9.17-16.p2.2.hum1
sudo-0:1.9.5p2-2.el8_10
RHSA-2026:75571

Official advisory · high-confidence parse· fetched 8 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation

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'.

Official advisory · high-confidence parse· fetched 8 days ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Red Hat Security Data APIofficial
Official vendor source used to discover this advisory; it remains the authority for affected products and remediation. Discovered from the machine-readable feed https://access.redhat.com/hydra/rest/securitydata/cve.json; this link opens the Red Hat Linux advisory index instead of the raw feed document.
Red Hat Linux
Official vendor advisoryofficial
Official advisory page fetched and parsed; accepted detail fields are attributed to this page.
Red Hat Linux
CVE.org CNA affected-product recordCVE.org
Structured CNA affected[] data independently confirmed the affected product scope; native advisory content remains authoritative.
CVE Program

Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2026-96512NVD CVE.org MITRE

Discussion(0)

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