What is the CVSS score of CVE-2025-6966?

CVE-2025-6966 has a CVSS 3.1 base score of 5.5 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.0%.

Which versions of Python are affected by CVE-2025-6966?

CVE-2025-6966 presents moderate security risk, a null pointer dereference vulnerability rated CVSS 5.5. Exploitation could compromise the security of affected deployments.. A patch is available.

Is there a public PoC exploit available for CVE-2025-6966?

Yes, a public proof-of-concept exploit is available for CVE-2025-6966. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2025-6966?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Python CVE-2025-6966

EUVD-2025-201407 MEDIUM

NULL Pointer Dereference (CWE-476)

2025-12-05 security@ubuntu.com

Null Pointer Dereference Python Denial Of Service Ubuntu Debian Debian Linux Python Apt Red Hat

5.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.5 MEDIUM

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

Ubuntu

MEDIUM

qualitative

Red Hat

4.0 MEDIUM

qualitative

Primary rating from NVD.

CVSS VectorNVD

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

EUVD ID Assigned

Mar 15, 2026 - 17:08 euvd

EUVD-2025-201407

Analysis Generated

Mar 15, 2026 - 17:08 vuln.today

PoC Detected

Jan 07, 2026 - 22:20 vuln.today

Public exploit code

CVE Published

Dec 05, 2025 - 13:16 nvd

MEDIUM 5.5

DescriptionCVE.org

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.

Analysis

Technical ContextAI

A NULL pointer dereference occurs when the application attempts to use a pointer that has not been initialized or has been set to NULL.

RemediationAI

Add NULL checks before pointer dereference operations. Use static analysis to identify potential NULL pointer issues. Enable compiler warnings.

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Same weakness CWE-476 – NULL Pointer Dereference

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7.5

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4.3

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7.5

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9.8

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7.5

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7.5

CVE-2026-21525 MEDIUM

6.2

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5.9

Same technique Null Pointer Dereference

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7.5

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4.3

CVE-2017-3730 HIGH POC

7.5

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9.8

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7.5

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7.5

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6.2

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5.9

Vendor StatusVendor

Ubuntu

Priority: Medium

python-apt

Release	Status	Version
upstream	released	3.1.0
bionic	released	1.6.6ubuntu0.1~esm1
focal	released	2.0.1ubuntu0.20.04.1+esm1
jammy	released	2.4.0ubuntu4.1
noble	released	2.7.7ubuntu5.1
plucky	released	3.0.0ubuntu0.25.04.1
questing	released	3.0.0ubuntu1.1
trusty	released	0.9.3.5ubuntu3+esm5
xenial	released	1.1.0~beta1ubuntu0.16.04.12+esm1

USN-7916-1 USN-7916-2

Debian

Bug #1122291

python-apt

Release	Status	Fixed Version	Urgency
bullseye	fixed	2.2.1.1	-
bullseye (security)	fixed	2.2.1.1	-
bookworm	vulnerable	2.6.0	-
trixie	vulnerable	3.0.0	-
forky, sid	fixed	3.1.0	-
(unstable)	fixed	3.1.0	-

DLA-4408-1

CVE-2025-6966 vulnerability details – vuln.today

Back

Python CVE-2025-6966

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

Analysis

Technical ContextAI

RemediationAI

More in Python

Same weakness CWE-476 – NULL Pointer Dereference

Same technique Null Pointer Dereference

Vendor StatusVendor

Ubuntu

Debian

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External POC / Exploit Code