CVE catalog
CVE-2026-96512
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 T
- Severity
- High · CVSS 7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.32% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | sudo | sid | 1.9.17p2-9 | fixed |
| Debian | sudo | forky | 1.9.17p2-9 | fixed |
| Debian | sudo | trixie | 1.9.16p2-3+deb13u2 | vulnerable |
| Debian | sudo | bookworm | 1.9.13p3-1+deb12u4 | vulnerable |
| Debian | sudo | bookworm-security | 1.9.13p3-1+deb12u2 | vulnerable |
| Ubuntu | sudo | noble | 1.9.15p5-3ubuntu5.24.04.4 | fixed |
| Ubuntu | libnss-sudo | noble | 1.9.15p5-3ubuntu5.24.04.4 | fixed |
| Ubuntu | sudo-ldap | noble | 1.9.15p5-3ubuntu5.24.04.4 | fixed |
| Ubuntu | sudo | 22.04 | 1.9.5p2-3ubuntu2 | vulnerable |
| Ubuntu | sudo | 22.04 | 1.9.9-1ubuntu2 | vulnerable |
| Ubuntu | sudo | 22.04 | 1.9.9-1ubuntu2.1 | vulnerable |
| Ubuntu | sudo | 22.04 | 1.9.9-1ubuntu2.2 | vulnerable |
| Ubuntu | sudo | 22.04 | 1.9.9-1ubuntu2.3 | vulnerable |
| Ubuntu | sudo | 22.04 | 1.9.9-1ubuntu2.4 | vulnerable |
| Ubuntu | sudo | 22.04 | 1.9.9-1ubuntu2.5 | vulnerable |
| Ubuntu | sudo | 22.04 | 1.9.9-1ubuntu2.6 | vulnerable |
| Ubuntu | sudo | 22.04 | 1.9.9-1ubuntu2.7 | fixed |
| Ubuntu | sudo | 24.04 | 1.9.14p2-1ubuntu1 | vulnerable |
| Ubuntu | sudo | 24.04 | 1.9.15p5-3ubuntu1 | vulnerable |
| Ubuntu | sudo | 24.04 | 1.9.15p5-3ubuntu3 | vulnerable |
| Ubuntu | sudo | 24.04 | 1.9.15p5-3ubuntu4 | vulnerable |
| Ubuntu | sudo | 24.04 | 1.9.15p5-3ubuntu5 | vulnerable |
| Ubuntu | sudo | 24.04 | 1.9.15p5-3ubuntu5.24.04.1 | vulnerable |
| Ubuntu | sudo | 24.04 | 1.9.15p5-3ubuntu5.24.04.2 | vulnerable |
| Ubuntu | sudo | 24.04 | 1.9.15p5-3ubuntu5.24.04.3 | vulnerable |
| Ubuntu | sudo | 24.04 | 1.9.15p5-3ubuntu5.24.04.4 | fixed |
| Ubuntu | sudo | 26.04 | 1.9.17p2-1ubuntu1 | vulnerable |
| Ubuntu | sudo | 26.04 | 1.9.17p2-1ubuntu2 | vulnerable |
| Ubuntu | sudo | 26.04 | 1.9.17p2-1ubuntu3 | vulnerable |
| Ubuntu | sudo | 26.04 | 1.9.17p2-1ubuntu3.1 | vulnerable |
| Ubuntu | sudo | 26.04 | 1.9.17p2-1ubuntu3.2 | fixed |
| Ubuntu | sudo | pro | 1.8.27-1ubuntu4 | vulnerable |
| Ubuntu | sudo | pro | 1.8.29-1ubuntu1 | vulnerable |
| Ubuntu | sudo | pro | 1.8.31-1ubuntu1 | vulnerable |
| Ubuntu | sudo | pro | 1.8.31-1ubuntu1.1 | vulnerable |
| Ubuntu | sudo | pro | 1.8.31-1ubuntu1.2 | vulnerable |
| Ubuntu | sudo | pro | 1.8.31-1ubuntu1.4 | vulnerable |
| Ubuntu | sudo | pro | 1.8.31-1ubuntu1.5 | vulnerable |
| Ubuntu | sudo | pro | 1.8.31-1ubuntu1.5+esm1 | vulnerable |
| Ubuntu | sudo | 22.04 | 1.9.5p2-3ubuntu2 | vulnerable |
| Ubuntu | sudo | 22.04 | 1.9.9-1ubuntu2 | vulnerable |
| Ubuntu | sudo | 22.04 | 1.9.9-1ubuntu2.1 | vulnerable |
| Ubuntu | sudo | 22.04 | 1.9.9-1ubuntu2.2 | vulnerable |
| Ubuntu | sudo | 22.04 | 1.9.9-1ubuntu2.3 | vulnerable |
| Ubuntu | sudo | 22.04 | 1.9.9-1ubuntu2.4 | vulnerable |
| Ubuntu | sudo | 22.04 | 1.9.9-1ubuntu2.5 | vulnerable |
| Ubuntu | sudo | 22.04 | 1.9.9-1ubuntu2.6 | vulnerable |
| Ubuntu | sudo | 22.04 | 1.9.9-1ubuntu2.7 | fixed |
| Ubuntu | sudo | 24.04 | 1.9.14p2-1ubuntu1 | vulnerable |
| Ubuntu | sudo | 24.04 | 1.9.15p5-3ubuntu1 | vulnerable |
| Ubuntu | sudo | 24.04 | 1.9.15p5-3ubuntu3 | vulnerable |
| Ubuntu | sudo | 24.04 | 1.9.15p5-3ubuntu4 | vulnerable |
| Ubuntu | sudo | 24.04 | 1.9.15p5-3ubuntu5 | vulnerable |
| Ubuntu | sudo | 24.04 | 1.9.15p5-3ubuntu5.24.04.1 | vulnerable |
| Ubuntu | sudo | 24.04 | 1.9.15p5-3ubuntu5.24.04.2 | vulnerable |
| Ubuntu | sudo | 24.04 | 1.9.15p5-3ubuntu5.24.04.3 | vulnerable |
| Ubuntu | sudo | 24.04 | 1.9.15p5-3ubuntu5.24.04.4 | fixed |
| Ubuntu | sudo | 26.04 | 1.9.17p2-1ubuntu1 | vulnerable |
| Ubuntu | sudo | 26.04 | 1.9.17p2-1ubuntu2 | vulnerable |
| Ubuntu | sudo | 26.04 | 1.9.17p2-1ubuntu3 | vulnerable |
| Ubuntu | sudo | 26.04 | 1.9.17p2-1ubuntu3.1 | vulnerable |
| Ubuntu | sudo | 26.04 | 1.9.17p2-1ubuntu3.2 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | sudo | source | sid | 1.9.17p2-9 | not yet assigned | Not reported | [1148890] |
| Debian | sudo | source | forky | 1.9.17p2-9 | not yet assigned | Not reported | [1148890] |
| Debian | sudo | source | trixie | (unfixed) | not yet assigned | Not reported | [1148890] |
| Debian | sudo | source | bookworm | (unfixed) | not yet assigned | Not reported | [1148890] |
| Ubuntu | sudo | deb | noble | 1.9.15p5-3ubuntu5.24.04.4 | Not reported | Not reported | Not reported |
| Ubuntu | libnss-sudo | deb | noble | 1.9.15p5-3ubuntu5.24.04.4 | Not reported | Not reported | Not reported |
| Ubuntu | sudo-ldap | deb | noble | 1.9.15p5-3ubuntu5.24.04.4 | Not reported | Not reported | Not reported |
| Ubuntu | sudo | deb | 22.04 | 1.9.9-1ubuntu2.7 | Not reported | USN-8895-1 | Not reported |
| Ubuntu | sudo | deb | 24.04 | 1.9.15p5-3ubuntu5.24.04.4 | Not reported | USN-8895-1 | Not reported |
| Ubuntu | sudo | deb | 26.04 | 1.9.17p2-1ubuntu3.2 | Not reported | USN-8895-1 | Not reported |
| Ubuntu | sudo | deb | 22.04 | 1.9.9-1ubuntu2.7 | Not reported | UBUNTU-CVE-2026-96512 | Not reported |
| Ubuntu | sudo | deb | 24.04 | 1.9.15p5-3ubuntu5.24.04.4 | Not reported | UBUNTU-CVE-2026-96512 | Not reported |
| Ubuntu | sudo | deb | 26.04 | 1.9.17p2-1ubuntu3.2 | Not reported | UBUNTU-CVE-2026-96512 | Not reported |
Notes
[trixie] sudo: Minor issue [bookworm] sudo: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libnss-sudo]Affected
Source package: [sudo]
Details (4)
1.9.13p3-1+deb12u4· all · bookwormAffected
nvd · sudo · debian · bookworm; nvd · sudo · debian · 12
1.9.13p3-1+deb12u4· all · bookwormAffected
nvd · sudo · debian · bookworm; nvd · sudo · debian · 12
1.9.13p3-1+deb12u2· all · bookworm-securityAffected
nvd · sudo · debian · bookworm; nvd · sudo · debian · 12
1.9.13p3-1+deb12u2· all · bookworm-securityAffected
nvd · sudo · debian · bookworm; nvd · sudo · debian · 12
- [sudo]Affected
Details (4)
1.9.13p3-1+deb12u4· amd64 · bookwormAffected
nvd · sudo · debian · bookworm; nvd · sudo · debian · 12
1.9.13p3-1+deb12u4· arm64 · bookwormAffected
nvd · sudo · debian · bookworm; nvd · sudo · debian · 12
1.9.13p3-1+deb12u2· amd64 · bookworm-securityAffected
nvd · sudo · debian · bookworm; nvd · sudo · debian · 12
1.9.13p3-1+deb12u2· arm64 · bookworm-securityAffected
nvd · sudo · debian · bookworm; nvd · sudo · debian · 12
- [sudo-ldap]Affected
Source package: [sudo]
Details (4)
1.9.13p3-1+deb12u4· amd64 · bookwormAffected
nvd · sudo · debian · bookworm; nvd · sudo · debian · 12
1.9.13p3-1+deb12u4· arm64 · bookwormAffected
nvd · sudo · debian · bookworm; nvd · sudo · debian · 12
1.9.13p3-1+deb12u2· amd64 · bookworm-securityAffected
nvd · sudo · debian · bookworm; nvd · sudo · debian · 12
1.9.13p3-1+deb12u2· arm64 · bookworm-securityAffected
nvd · sudo · debian · bookworm; nvd · sudo · debian · 12
[Debian 13 (Trixie)]
- [libnss-sudo]Affected
Source package: [sudo]
Details (2)
1.9.16p2-3+deb13u2· all · trixieAffected
nvd · sudo · debian · 13
1.9.16p2-3+deb13u2· all · trixieAffected
nvd · sudo · debian · 13
- [sudo]Affected
Details (2)
1.9.16p2-3+deb13u2· amd64 · trixieAffected
nvd · sudo · debian · 13
1.9.16p2-3+deb13u2· arm64 · trixieAffected
nvd · sudo · debian · 13
- [sudo-ldap]Affected
Source package: [sudo]
Details (2)
1.9.16p2-3+deb13u2· amd64 · trixieAffected
nvd · sudo · debian · 13
1.9.16p2-3+deb13u2· arm64 · trixieAffected
nvd · sudo · debian · 13
Observed:
References
- [http://www.openwall.com/lists/oss-security/2026/09/24/4]
- [https://access.redhat.com/errata/RHSA-2026:71609]
- [https://access.redhat.com/errata/RHSA-2026:75571]
- [https://access.redhat.com/errata/RHSA-2026:75579]
- [https://access.redhat.com/errata/RHSA-2026:75580]
- [https://access.redhat.com/errata/RHSA-2026:82939]
- [https://access.redhat.com/errata/RHSA-2026:86633]
- [https://access.redhat.com/errata/RHSA-2026:86634]
- [https://access.redhat.com/errata/RHSA-2026:86635]
- [https://access.redhat.com/errata/RHSA-2026:87026]
- [https://access.redhat.com/errata/RHSA-2026:90287]
- [https://access.redhat.com/security/cve/CVE-2026-96512]
- [https://bugzilla.redhat.com/show_bug.cgi?id=2539327]
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2026_75571.json]
- [https://github.com/sudo-project/sudo/commit/1820a349687522f51023d1ae5925125f59679a8c]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-96512]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-96512]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-96512]
- [https://osv.dev/vulnerability/USN-8895-1]
- [https://security-tracker.debian.org/tracker/CVE-2026-96512]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-96512.json]
- [https://ubuntu.com/security/notices/USN-8895-1]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3551.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]