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VulnerabilityPublished Updated

CVE-2026-96512: Red Hat Enterprise Linux 10 · Incorrect Authorization

Affects Red Hat Enterprise Linux 10Source CVE Database V5

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Not known to be exploited · CVSS 7.8 High.

Data as of 5 Nov 2026, 23:24 UTC

CVSS 3.1 base score
7.8High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (redhat)CVSS 3.17.8
EPSS
0.3% chance of exploitation in 30 days – higher than 25% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 23 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    Public exploit code: GitHub proofs of concept

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), GitHub proofs of concept, the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Red Hat Enterprise Linux 10sudoAffected–Fixed in–
Red Hat Enterprise Linux 10.0 Extended Update SupportsudoAffected–Fixed in–
Red Hat Enterprise Linux 7 Extended Lifecycle SupportsudoAffected–Fixed in–
Red Hat Enterprise Linux 8sudoAffected–Fixed in–
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportsudoAffected–Fixed in–
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnsudoAffected–Fixed in–

AI-suggested

Red Hat has released updated sudo packages (e.g., sudo-1.9.17-16.p2.2.hum1) that fix this vulnerability. Administrators should apply these updates promptly. Additionally, as a configuration mitigation, all NOTBEFORE and NOTAFTER timestamps in sudoers rules should be appended with the 'Z' timezone suffix to ensure timestamps are interpreted as UTC and not influenced by the TZ environment variable. Administrators can audit sudoers configurations using: grep -rE 'NOT(BEFORE|AFTER)=' /etc/sudoers /etc/sudoers.d/ to verify compliance. No other actions are required as authentication is unaffected.

Description

CVE-2026-96512 is a local authorization bypass vulnerability in sudo on Red Hat Enterprise Linux 10. It occurs when sudoers rules use NOTBEFORE or NOTAFTER time-based restrictions with timestamps missing the trailing 'Z' timezone indicator. This causes sudo to rely on the TZ environment variable from the calling user, allowing an unprivileged user to manipulate the time window by setting TZ to an extreme offset and execute commands outside the intended time frame. Authentication is not bypassed; only the time-based authorization check is affected. This vulnerability requires a sudoers rule with the affected timestamp format and the attacker to be subject to that rule. Red Hat has released updates addressing this issue.

References

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