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.
Advisories

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Fixes

Solution

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Workaround

No workaround given by the vendor.

History

Tue, 10 Feb 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-120
References
Metrics threat_severity

None

threat_severity

Moderate


Mon, 09 Feb 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 09 Feb 2026 11:00:00 +0000

Type Values Removed Values Added
First Time appeared Vim
Vim vim
Vendors & Products Vim
Vim vim

Fri, 06 Feb 2026 23:00:00 +0000

Type Values Removed Values Added
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.
Title Heap Overflow in Vim
Weaknesses CWE-122
References
Metrics cvssV3_1

{'score': 6.6, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-02-09T15:26:17.789Z

Reserved: 2026-02-05T18:35:52.356Z

Link: CVE-2026-25749

cve-icon Vulnrichment

Updated: 2026-02-09T15:19:15.294Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-02-06T23:15:54.230

Modified: 2026-02-09T16:08:55.263

Link: CVE-2026-25749

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-02-06T22:43:38Z

Links: CVE-2026-25749 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-02-09T10:45:07Z

Weaknesses