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CVE-2026-25749: Medium Vulnerability in Vim

A medium-severity heap buffer overflow vulnerability in Vim affects versions prior to 9.1.2132. Organizations using Vim are advised to patch immediately to mitigate potential risks associated with this issue.

MEDIUMCVSS 6.6 · Published February 6, 2026

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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.

The vulnerability's CVSS score is 6.6, indicating a medium severity level. It poses risks such as potential unauthorized access and data manipulation, making it critical for organizations using Vim to prioritize remediation to protect their systems.

Given the nature of the vulnerability and the potential impacts, organizations should prioritize patching immediately. Failure to address this vulnerability could lead to significant operational disruptions or data integrity issues.

Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.

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