Description
NULL pointer dereference in TagSection.keys() in python-apt on APT-based Linux systems allows a local attacker to cause a denial of service (process crash) via a crafted deb822 file with a malformed non-UTF-8 key.
Published: 2025-12-05
Score: 6.9 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4408-1 python-apt security update
Ubuntu USN Ubuntu USN USN-7916-1 python-apt vulnerability
Ubuntu USN Ubuntu USN USN-7916-2 python-apt regression
History

Wed, 07 Jan 2026 22:30:00 +0000

Type Values Removed Values Added
First Time appeared Canonical ubuntu Linux
Debian
Debian debian Linux
Ubuntu
Ubuntu python-apt
CPEs cpe:2.3:a:ubuntu:python-apt:*:*:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:0.9.3.11:-:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:0.9.3.11:build1:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:0.9.3.5:ubuntu1:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:0.9.3.5:ubuntu2:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:1.1.0:beta1:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:1.1.0:beta1build1:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:1.1.0:beta1ubuntu0.16.04.10:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:1.1.0:beta1ubuntu0.16.04.11:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:1.1.0:beta1ubuntu0.16.04.1:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:1.1.0:beta1ubuntu0.16.04.2:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:1.1.0:beta1ubuntu0.16.04.3:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:1.1.0:beta1ubuntu0.16.04.4:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:1.1.0:beta1ubuntu0.16.04.5:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:1.1.0:beta1ubuntu0.16.04.7:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:1.1.0:beta1ubuntu0.16.04.8:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:1.1.0:beta1ubuntu0.16.04.9:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:1.1.0:beta2ubuntu1:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:1.1.0:beta3:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:1.1.0:beta4:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:1.1.0:beta4ubuntu1:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:1.1.0:beta5:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:1.1.0:beta5ubuntu1:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:1.6.6:-:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:2.0.1:-:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:2.4.0:-:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:2.4.0:\+22.10:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:2.4.0:ubuntu1:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:2.4.0:ubuntu2:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:2.4.0:ubuntu3:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:2.4.0:ubuntu4:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:2.7.7:-:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:2.7.7:build1:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:2.7.7:ubuntu1:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:2.7.7:ubuntu2:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:2.7.7:ubuntu3:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:2.7.7:ubuntu4:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:2.7.7:ubuntu5:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:3.0.0:-:*:*:*:*:*:*
cpe:2.3:a:ubuntu:python-apt:3.0.0:ubuntu1:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:-:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
Vendors & Products Canonical ubuntu Linux
Debian
Debian debian Linux
Ubuntu
Ubuntu python-apt
Metrics cvssV3_1

{'score': 4.0, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

Wed, 17 Dec 2025 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 4.0, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}

threat_severity

Moderate

Mon, 15 Dec 2025 22:30:00 +0000

Type Values Removed Values Added
References

Tue, 09 Dec 2025 10:15:00 +0000

Type Values Removed Values Added
First Time appeared Canonical
Canonical python-apt
Vendors & Products Canonical
Canonical python-apt

Mon, 08 Dec 2025 13:30:00 +0000

Type Values Removed Values Added
Description NULL pointer dereference in TagSection.keys() in python-apt on APT-based Linux systems allows a local attacker to cause a denial of service (process crash) via a crafted deb822 file with a malformed non-UTF-8 key. NULL pointer dereference in TagSection.keys() in python-apt on APT-based Linux systems allows a local attacker to cause a denial of service (process crash) via a crafted deb822 file with a malformed non-UTF-8 key.

Fri, 05 Dec 2025 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Fri, 05 Dec 2025 13:15:00 +0000

Type Values Removed Values Added
Description NULL pointer dereference in TagSection.keys() in python-apt on APT-based Linux systems allows a local attacker to cause a denial of service (process crash) via a crafted deb822 file with a malformed non-UTF-8 key.
Title Null-pointer dereference in python-apt TagSection.keys()
Weaknesses CWE-476
References
Metrics cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Subscriptions

Canonical Python-apt Ubuntu Linux
Debian Debian Linux
Ubuntu Python-apt
cve-icon MITRE

Status: PUBLISHED

Assigner: canonical

Published:

Updated: 2025-12-15T22:04:15.781Z

Reserved: 2025-07-01T09:59:55.552Z

Link: CVE-2025-6966

cve-icon Vulnrichment

Updated: 2025-12-15T22:04:15.781Z

cve-icon NVD

Status : Analyzed

Published: 2025-12-05T13:16:05.220

Modified: 2026-01-07T22:20:56.370

Link: CVE-2025-6966

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-12-05T12:59:41Z

Links: CVE-2025-6966 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-12-09T10:05:56Z

Weaknesses