UBUNTU-CVE-2026-96512

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Source

https://ubuntu.com/security/CVE-2026-96512

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-96512.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-96512

Upstream

CVE-2026-96512

Published

2026-09-24T00:00:00Z

Modified

2026-09-25T06:37:26Z

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
Ubuntu - medium

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

Ubuntu:22.04:LTS

sudo

Package

Name: sudo
Purl: pkg:deb/ubuntu/sudo?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.9.5p2-3ubuntu2

1.9.9-1ubuntu2

1.9.9-1ubuntu2.1

1.9.9-1ubuntu2.2

1.9.9-1ubuntu2.3

1.9.9-1ubuntu2.4

1.9.9-1ubuntu2.5

1.9.9-1ubuntu2.6

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "sudo",
            "binary_version":  "1.9.9-1ubuntu2.6"
        },
        {
            "binary_name":  "sudo-ldap",
            "binary_version":  "1.9.9-1ubuntu2.6"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-96512.json"

Ubuntu:24.04:LTS

sudo

Package

Name: sudo
Purl: pkg:deb/ubuntu/sudo?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.9.14p2-1ubuntu1

1.9.15p5-3ubuntu1

1.9.15p5-3ubuntu3

1.9.15p5-3ubuntu4

1.9.15p5-3ubuntu5

1.9.15p5-3ubuntu5.24.04.1

1.9.15p5-3ubuntu5.24.04.2

1.9.15p5-3ubuntu5.24.04.3

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libnss-sudo",
            "binary_version":  "1.9.15p5-3ubuntu5.24.04.3"
        },
        {
            "binary_name":  "sudo",
            "binary_version":  "1.9.15p5-3ubuntu5.24.04.3"
        },
        {
            "binary_name":  "sudo-ldap",
            "binary_version":  "1.9.15p5-3ubuntu5.24.04.3"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-96512.json"

Ubuntu:26.04:LTS

sudo

Package

Name: sudo
Purl: pkg:deb/ubuntu/sudo?arch=source&distro=resolute

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.9.17p2-1ubuntu1

1.9.17p2-1ubuntu2

1.9.17p2-1ubuntu3

1.9.17p2-1ubuntu3.1

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libnss-sudo",
            "binary_version":  "1.9.17p2-1ubuntu3.1"
        },
        {
            "binary_name":  "sudo",
            "binary_version":  "1.9.17p2-1ubuntu3.1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-96512.json"

Ubuntu:Pro:14.04:LTS

sudo

Package

Name: sudo
Purl: pkg:deb/ubuntu/sudo?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.8.6p3-0ubuntu3

1.8.8-2ubuntu1

1.8.8-2ubuntu2

1.8.9p4-1ubuntu1

1.8.9p4-1ubuntu2

1.8.9p5-1ubuntu1

1.8.9p5-1ubuntu1.1

1.8.9p5-1ubuntu1.2

1.8.9p5-1ubuntu1.3

1.8.9p5-1ubuntu1.4

1.8.9p5-1ubuntu1.5+esm1

1.8.9p5-1ubuntu1.5+esm2

1.8.9p5-1ubuntu1.5+esm3

1.8.9p5-1ubuntu1.5+esm5

1.8.9p5-1ubuntu1.5+esm6

1.8.9p5-1ubuntu1.5+esm7

1.8.9p5-1ubuntu1.5+esm8

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "sudo",
            "binary_version":  "1.8.9p5-1ubuntu1.5+esm8"
        },
        {
            "binary_name":  "sudo-ldap",
            "binary_version":  "1.8.9p5-1ubuntu1.5+esm8"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-96512.json"

Ubuntu:Pro:16.04:LTS

sudo

Package

Name: sudo
Purl: pkg:deb/ubuntu/sudo?arch=source&distro=esm-infra%2Fxenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.8.12-1ubuntu3

1.8.16-0ubuntu1

1.8.16-0ubuntu1.1

1.8.16-0ubuntu1.2

1.8.16-0ubuntu1.3

1.8.16-0ubuntu1.4

1.8.16-0ubuntu1.5

1.8.16-0ubuntu1.6

1.8.16-0ubuntu1.7

1.8.16-0ubuntu1.8

1.8.16-0ubuntu1.9

1.8.16-0ubuntu1.10

1.8.16-0ubuntu1.10+esm1

1.8.16-0ubuntu1.10+esm2

1.8.16-0ubuntu1.10+esm3

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "sudo",
            "binary_version":  "1.8.16-0ubuntu1.10+esm3"
        },
        {
            "binary_name":  "sudo-ldap",
            "binary_version":  "1.8.16-0ubuntu1.10+esm3"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-96512.json"

Ubuntu:Pro:18.04:LTS

sudo

Package

Name: sudo
Purl: pkg:deb/ubuntu/sudo?arch=source&distro=esm-infra%2Fbionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.8.20p2-1ubuntu1

1.8.21p2-2ubuntu1

1.8.21p2-3ubuntu1

1.8.21p2-3ubuntu1.1

1.8.21p2-3ubuntu1.2

1.8.21p2-3ubuntu1.3

1.8.21p2-3ubuntu1.4

1.8.21p2-3ubuntu1.5

1.8.21p2-3ubuntu1.6

1.8.21p2-3ubuntu1.6+esm1

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "sudo",
            "binary_version":  "1.8.21p2-3ubuntu1.6+esm1"
        },
        {
            "binary_name":  "sudo-ldap",
            "binary_version":  "1.8.21p2-3ubuntu1.6+esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-96512.json"

Ubuntu:Pro:20.04:LTS

sudo

Package

Name: sudo
Purl: pkg:deb/ubuntu/sudo?arch=source&distro=esm-infra%2Ffocal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.8.27-1ubuntu4

1.8.29-1ubuntu1

1.8.31-1ubuntu1

1.8.31-1ubuntu1.1

1.8.31-1ubuntu1.2

1.8.31-1ubuntu1.4

1.8.31-1ubuntu1.5

1.8.31-1ubuntu1.5+esm1

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "sudo",
            "binary_version":  "1.8.31-1ubuntu1.5+esm1"
        },
        {
            "binary_name":  "sudo-ldap",
            "binary_version":  "1.8.31-1ubuntu1.5+esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-96512.json"