CVE-2026-28421

Vim has a heap-buffer-overflow and a segmentation fault

State: Published
Severity: 5.3 Medium
Published: Feb 27, 2026
Updated: May 28, 2026
Reserved: Feb 27, 2026

Description

Vim is an open source, command line text editor. Versions prior to 9.2.0077 have a heap-buffer-overflow and a segmentation fault (SEGV) exist in Vim's swap file recovery logic. Both are caused by unvalidated fields read from crafted pointer blocks within a swap file. Version 9.2.0077 fixes the issue.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L	GitHub_M

Weaknesses

CWE-20 Improper Input Validation
CWE-122 Heap-based Buffer Overflow

Affected Products

Product	Versions
vimvim	< 9.2.0077Affected

References

https://github.com/vim/vim/security/advisories/GHSA-r2gw-2x48-jj5p
https://github.com/vim/vim/commit/65c1a143c331c886dc28
https://github.com/vim/vim/releases/tag/v9.2.0077
http://www.openwall.com/lists/oss-security/2026/02/27/10

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