7.8

CVE-2026-96512

Medienbericht

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

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerRed Hat
≫
Produkt Red Hat Enterprise Linux 10
Default Statusaffected
Version 0:1.9.17-10.p2.el10_2.7
Version < *
Status unaffected
HerstellerRed Hat
≫
Produkt Red Hat Enterprise Linux 8
Default Statusaffected
Version 0:1.9.5p2-2.el8_10
Version < *
Status unaffected
HerstellerRed Hat
≫
Produkt Red Hat Enterprise Linux 9
Default Statusaffected
Version 0:1.9.17p2-3.el9_8.3
Version < *
Status unaffected
HerstellerRed Hat
≫
Produkt Red Hat Enterprise Linux 9
Default Statusaffected
Version 0:1.9.17p2-3.el9_8.3
Version < *
Status unaffected
HerstellerRed Hat
≫
Produkt Red Hat Hardened Images
Default Statusaffected
Version 1.9.17-16.p2.2.hum1
Version < *
Status unaffected
HerstellerRed Hat
≫
Produkt Red Hat Enterprise Linux 7
Default Statusaffected
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.13% 0.023
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
RedHat 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-863 Incorrect Authorization

The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

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Media Report
05.10.2026 17:13
https://access.redhat.com/security/cve/CVE-2026-96512
https://bugzilla.redhat.com/show_bug.cgi?id=2539327
https://github.com/sudo-project/sudo/commit/1820a349687522f51023d1ae5925125f59679a8c
https://access.redhat.com/errata/RHSA-2026:71609
http://www.openwall.com/lists/oss-security/2026/09/24/4
https://access.redhat.com/errata/RHSA-2026:75580
https://access.redhat.com/errata/RHSA-2026:75579
https://access.redhat.com/errata/RHSA-2026:75571