CVE-2025-22134: vim Heap Overflow — Fix

Description

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

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CVSS v3.1 Score

4.2

MEDIUM

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

Weakness Type (CWE)

CWE-122 CWE-122

Affected Products

Vendor	Product	Versions
vim	vim	< 9.1.1003
netapp	bootstrap_os	All
netapp	hci_compute_node	All

References

Advisories & Patches

https://github.com/vim/vim/commit/c9a1e257f1630a0866447e53a564f7ff96a80ead https://github.com/vim/vim/security/advisories/GHSA-5rgf-26wj-48v8

Other References

http://www.openwall.com/lists/oss-security/2025/01/11/1 https://security.netapp.com/advisory/ntap-20250314-0004/

Frequently Asked Questions

What is CVE-2025-22134? +

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 It has a CVSS v3.1 base score of 4.2 (MEDIUM).

How severe is CVE-2025-22134? +

CVE-2025-22134 has a CVSS v3.1 score of 4.2 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-22134? +

CVE-2025-22134 affects products from netapp, vim, specifically: bootstrap_os, hci_compute_node, vim. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-22134? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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