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CVE-2025-6966

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Date: December 5, 2025

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.

Severity Score

Related Resources (4)

https://lists.debian.org/debian-lts-announce/2025/12/msg00019.html
https://bugs.launchpad.net/ubuntu/+source/python-apt/+bug/2091865
https://nvd.nist.gov/vuln/detail/CVE-2025-6966
https://www.mend.io/vulnerability-database/CVE-2025-6966

Severity Score

Weakness Type (CWE)

NULL Pointer Dereference

CWE-476

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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