DEBIAN-CVE-2026-96512

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Source
https://security-tracker.debian.org/tracker/CVE-2026-96512
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-96512.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-96512
Upstream
Published
2026-09-23T14:17:10Z
Modified
2026-09-25T08:47:19Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Debian:12 / sudo

Package

Name
sudo
Purl
pkg:deb/debian/sudo?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.9.13p3-1
1.9.13p3-1+deb12u1
1.9.13p3-1+deb12u2
1.9.13p3-1+deb12u3
1.9.13p3-1+deb12u4
1.9.13p3-2
1.9.13p3-3
1.9.14p2-1
1.9.15p2-1
1.9.15p2-2
1.9.15p3-1
1.9.15p4-1
1.9.15p4-2
1.9.15p5-1
1.9.15p5-2
1.9.15p5-3
1.9.15p5-3+hurd.1
1.9.16-1
1.9.16-2
1.9.16p1-1
1.9.16p2-1
1.9.16p2-2
1.9.16p2-3
1.9.17p1-1
1.9.17p2-1
1.9.17p2-1exp1
1.9.17p2-2
1.9.17p2-3
1.9.17p2-4
1.9.17p2-5
1.9.17p2-6
1.9.17p2-7
1.9.17p2-8

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-96512.json"

Debian:13 / sudo

Package

Name
sudo
Purl
pkg:deb/debian/sudo?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.9.16p2-3
1.9.16p2-3+deb13u1
1.9.16p2-3+deb13u2
1.9.17p1-1
1.9.17p2-1
1.9.17p2-1exp1
1.9.17p2-2
1.9.17p2-3
1.9.17p2-4
1.9.17p2-5
1.9.17p2-6
1.9.17p2-7
1.9.17p2-8

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-96512.json"

Debian:14 / sudo

Package

Name
sudo
Purl
pkg:deb/debian/sudo?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.9.16p2-3
1.9.17p1-1
1.9.17p2-1
1.9.17p2-1exp1
1.9.17p2-2
1.9.17p2-3
1.9.17p2-4
1.9.17p2-5
1.9.17p2-6
1.9.17p2-7
1.9.17p2-8

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-96512.json"