Heap-based Buffer Overflow Affecting vim package, versions <2:9.1.2141-1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.21% (12th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-VIM-15248018
  • published7 Feb 2026
  • disclosed6 Feb 2026

Introduced: 6 Feb 2026

CVE-2026-25749  (opens in a new tab)
CWE-122  (opens in a new tab)

How to fix?

Upgrade Debian:unstable vim to version 2:9.1.2141-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream vim package and not the vim package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1