CVE-2025-6966

5.5 MEDIUM

Published: December 05, 2025 Modified: January 07, 2026

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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

https://bugs.launchpad.net/ubuntu/+source/python-apt/+bug/2091865

Source: security@ubuntu.com

Exploit Issue Tracking Third Party Advisory

https://lists.debian.org/debian-lts-announce/2025/12/msg00019.html

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing List Third Party Advisory

2 reference(s) from NVD

Quick Stats

CVSS v3 Score

5.5 / 10.0

EPSS (Exploit Probability)

0.0%

4th percentile

Exploitation Status

Not in CISA KEV

Weaknesses (CWE)

CWE-476

Affected Vendors

debian canonical ubuntu

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