sudo · Incorrect Authorization
Source GCVE Database
Not known to be exploited · CVSS 7.8 High : patch Red Hat Enterprise Linux 10 soon.
Data as of 26 Oct 2026, 17:16 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 24% 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:HExploitation evidence
Disclosed: evidence found.
CVE published 23 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Patches and advisories
- access.redhat.com/errata/RHSA-2026:71609 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:75571 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:75579 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:75580 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:82939 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:86633 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:86634 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:86635 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:87026 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:90287 (opens in a new tab)
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10sudo | Affected– | Fixed in– |
| Red Hat Enterprise Linux 10.0 Extended Update Supportsudo | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8sudo | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8.8 Telecommunications Update Servicesudo | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8.8 Update Services for SAP Solutionssudo | Affected– | Fixed in– |
| Red Hat Enterprise Linux 9sudo | Affected– | Fixed in– |
AI-suggested
Red Hat has released official patches addressing this vulnerability. Users should apply the updates to sudo packages as provided in Red Hat advisories RHSA-2026:71609, RHSA-2026:75571, and others listed. Applying these updates will correct the handling of the TZ environment variable in time-based sudoers rules and prevent exploitation. No additional mitigation actions are required beyond applying the vendor-provided patches.
Description
A vulnerability in sudo affects time-based access restrictions using NOTBEFORE or NOTAFTER rules when timestamps omit the trailing 'Z' timezone indicator. The flaw allows an unprivileged local user to manipulate the TZ environment variable to shift the authorization window by up to approximately 25 hours, causing expired rules to be treated as valid. This enables execution of commands outside the intended time window without bypassing authentication.
References
- nvd.nist.gov/vuln/detail/CVE-2026-96512 (opens in a new tab)
- github.com/sudo-project/sudo/commit/1820a349687522f51023d1ae5925125f59679a8c (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:71609 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:75571 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:75579 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:75580 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:82939 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:86633 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:86634 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:86635 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:87026 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:90287 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-96512 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2539327 (opens in a new tab)
- openwall.com/lists/oss-security/2026/09/24/4 (opens in a new tab)