CVE-2026-28420

Description

Vim is an open source, command line text editor. Prior to version 9.2.0076, a heap-based buffer overflow WRITE and an out-of-bounds READ exist in Vim's terminal emulator when processing maximum combining characters from Unicode supplementary planes. Version 9.2.0076 fixes the issue.

Affected Platforms

Weakness Type

CWE-122, CWE-125

References

• https://github.com/vim/vim/commit/bb6de2105b160e729c34063
• https://github.com/vim/vim/releases/tag/v9.2.0076
• https://github.com/vim/vim/security/advisories/GHSA-rvj2-jrf9-2phg
• http://www.openwall.com/lists/oss-security/2026/02/27/9