Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-96512
Red Hat Red Hat Hardened Images — Sudo: sudo: tz environment variable allows bypass of notbefore/notafter time-based authorization
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L L N U H H H 7.8 .0013 2.3 —
AFFECTED
Product Versions Fixed
Red Hat Hardened Images unspecified 1.9.17-16.p2.2.hum1
Red Hat Enterprise Linux 10 unspecified —
Red Hat Enterprise Linux 7 unspecified —
Red Hat Enterprise Linux 8 unspecified —
Red Hat Enterprise Linux 9 unspecified —
TIMELINE
Sep 23 Reserved by redhat
Sep 23 Published (CNA: redhat)
Sep 24 PATCH SHIPPED — CVE-2026-96512 (Red Hat Hardened Images). Fixed in Red Hat Hardened Images 1.9.17-16.p2.2.hum1.
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.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| September 23, 2026 | Reserved | Reserved by redhat |
| September 23, 2026 | Published | Published (CNA: redhat) |
| September 24, 2026 | PATCH SHIPPED | PATCH SHIPPED — CVE-2026-96512 (Red Hat Hardened Images). Fixed in Red Hat Hardened Images 1.9.17-16.p2.2.hum1. |
Affected
Affected products and packages — 5 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Red Hat | Red Hat Hardened Images | — | — | 1.9.17-16.p2.2.hum1 |
| Red Hat | Red Hat Enterprise Linux 10 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-96512 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
