What is the CVSS score of CVE-2025-22134?

CVE-2025-22134 has a CVSS 3.1 base score of 4.2 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L. EPSS exploitation probability: 0.1%.

Which versions of Windows are affected by CVE-2025-22134?

CVE-2025-22134 presents moderate security risk, a heap-based buffer overflow vulnerability rated CVSS 4.2. Exploitation could cause memory corruption or application crashes.. A patch is available.

How to fix or mitigate CVE-2025-22134?

During next maintenance window: Identify affected systems and apply vendor patches when convenient. Vendor patch is available.

Windows CVE-2025-22134

MEDIUM

Heap-based Buffer Overflow (CWE-122)

2025-01-13 security-advisories@github.com

Windows Buffer Overflow Heap Overflow Microsoft Red Hat Bootstrap Os Vim Suse

4.2

CVSS 3.1

CVSS VectorNVD

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

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:03 vuln.today

Patch released

Mar 28, 2026 - 18:03 nvd

Patch available

CVE Published

Jan 13, 2025 - 21:15 nvd

MEDIUM 4.2

DescriptionNVD

When switching to other buffers using the :all command and visual mode still being active, this may cause a heap-buffer overflow, because Vim does not properly end visual mode and therefore may try to access beyond the end of a line in a buffer. In Patch 9.1.1003 Vim will correctly reset the visual mode before opening other windows and buffers and therefore fix this bug. In addition it does verify that it won't try to access a position if the position is greater than the corresponding buffer line. Impact is medium since the user must have switched on visual mode when executing the :all ex command. The Vim project would like to thank github user gandalf4a for reporting this issue. The issue has been fixed as of Vim patch v9.1.1003

AnalysisAI

Technical ContextAI

This vulnerability is classified under CWE-122. When switching to other buffers using the :all command and visual mode still being active, this may cause a heap-buffer overflow, because Vim does not properly end visual mode and therefore may try to access beyond the end of a line in a buffer. In Patch 9.1.1003 Vim will correctly reset the visual mode before opening other windows and buffers and therefore fix this bug. In addition it does verify that it won't try to access a position if the position is greater than the corresponding buffer line. Impact is medium since the user must have switched on visual mode when executing the :all ex command. The Vim project would like to thank github user gandalf4a for reporting this issue. The issue has been fixed as of Vim patch v9.1.1003 Affected products include: Vim, Netapp Bootstrap Os.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.