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Vulnerability record · CVE-2025-22134 · published 13 January 2025

CVE-2025-22134: Neovim heap-based buffer overflow vulnerability

Neovim · Neovim

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

5.5 CVSS 3.1 Medium EPSS 0.38% · top 68.0% CWE-122 · Heap-based buffer overflow
5.5CVSS 3.1 base score
0.38%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

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

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

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/vim/vim/commit/c9a1e257f1630a0866447e53a564f7ff96a80ead Patch
https://github.com/vim/vim/security/advisories/GHSA-5rgf-26wj-48v8 Vendor Advisory
http://www.openwall.com/lists/oss-security/2025/01/11/1 Mailing ListThird Party Advisory
https://security.netapp.com/advisory/ntap-20250314-0004/ Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2025-22134), CISA KEV, FIRST EPSS (scores of 2026-11-14). This page is refreshed as NVD updates the record.