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Vim CVE-2026-25749

MEDIUM
Heap-based Buffer Overflow (CWE-122)
2026-02-06 security-advisories@github.com
Buffer Overflow Heap Overflow Vim
6.6
CVSS 3.1 · GitHub Advisory
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Severity by source

GitHub Advisory PRIMARY
6.6 MEDIUM
AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H
SUSE
MEDIUM
qualitative
Red Hat
7.3 MEDIUM
qualitative

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High

Lifecycle Timeline

4
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
PoC Detected
Feb 20, 2026 - 15:45 vuln.today
Public exploit code
Patch released
Feb 20, 2026 - 15:45 nvd
Patch available
CVE Published
Feb 06, 2026 - 23:15 nvd
MEDIUM 6.6

DescriptionGitHub Advisory

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.

AnalysisAI

Heap buffer overflow in Vim's tag file resolution allows local attackers with user privileges to corrupt heap memory and crash the application or potentially execute code by supplying a malicious 'helpfile' option value. The vulnerability exists in the get_tagfname() function which fails to validate the length of user-controlled input before copying it into a fixed-size buffer. Public exploit code exists for this issue affecting Vim prior to version 9.1.2132, though a patch is available.

Technical ContextAI

Classified as CWE-122 (Heap-based Buffer Overflow). Affects Vim. 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 i

RemediationAI

A vendor patch is available — apply it immediately. Fixed in version 9.1.2132.. Enable ASLR, DEP/NX, and stack canaries where possible.

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Same weakness CWE-122 – Heap-based Buffer Overflow

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Same technique Buffer Overflow

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Vendor StatusVendor

SUSE

Severity: Medium
Product Status
SUSE Liberty Linux 8 Fixed
SUSE Liberty Linux 9 Fixed
SLES15-SP5-CHOST-BYOS-SAP-CCloud Fixed
SLES15-SP6-CHOST-BYOS Fixed
SLES15-SP6-CHOST-BYOS-Aliyun Fixed

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CVE-2026-25749 vulnerability details – vuln.today
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