CVE-2026-25749
Heap Overflow in Vim
- State
- Published
- Severity
- 6.6 Medium
- Published
- Feb 6, 2026
- Updated
- Feb 9, 2026
- Reserved
- Feb 5, 2026
Description
Vim is an open source, command line text editor. Prior to version 9.1.2132, a heap buffer overflow vulnerability exists in Vim's tag file resolution logic when processing the 'helpfile' option. The vulnerability is located in the get_tagfname() function in src/tag.c. When processing help file tags, Vim copies the user-controlled 'helpfile' option value into a fixed-size heap buffer of MAXPATHL + 1 bytes (typically 4097 bytes) using an unsafe STRCPY() operation without any bounds checking. This issue has been patched in version 9.1.2132.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.6 Medium | CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H | GitHub_M |
Weaknesses
- CWE-122 Heap-based Buffer Overflow
Affected Products
| Product | Versions |
|---|---|
vimvim |
|
References
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