CVE-2026-28419: vim Buffer Underflow

Vulnerability summary

CVE-2026-28419 is a medium (CVSS 6.6) Buffer Underflow vulnerability in vim. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 7.4% of scored vulnerabilities.

Timeline

1. 27-02-2026
   PublishedVulnerability first disclosed.
2. 02-03-2026
   Last modifiedVulnerability information updated.

Description

Vim is an open source, command line text editor. Prior to version 9.2.0075, a heap-based buffer underflow exists in Vim's Emacs-style tags file parsing logic. When processing a malformed tags file where a delimiter appears at the start of a line, Vim attempts to read memory immediately preceding the allocated buffer. Version 9.2.0075 fixes the issue.

• CWE-124Buffer Underwrite ('Buffer Underflow')The product writes to a buffer using an index or pointer that references a memory location prior to the beginning of the buffer.
• CWE-125Out-of-bounds ReadThe product reads data past the end, or before the beginning, of the intended buffer.