Heap Overflow in Vim_CVE-2026-25749

6.6 / 10

MEDIUM

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

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.

Basic Information

ID CVE-2026-25749

Source GitHub_M

Published Feb 6, 2026 at 22:43

Affected Product

Vendor vim

Product vim

Version < 9.1.2132

Affected Versions vim vim < 9.1.2132

CWE Classification

CWE-122

References

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    "published": "2026-02-06T22:43:38.630Z",
    "modified": "2026-02-06T22:43:38.630Z",
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