CVE-2026-28420

Vim has Heap-based Buffer Overflow and OOB Read in :terminal

Published: 2/27/2026 Last updated: 3/2/2026 Reserved: 2/27/2026

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.

CNA assigner: GitHub_M (a0819718-46f1-4df5-94e2-005712e83aaa) Requested by: n/a

Metrics

Version	Score	Severity	Vector String
3.1	4.4	Medium	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

Opam packages affected (1)

conf-vim

Products affected (1)

Product	Vendor	Version
vim	vim	GenoaPI 1.0.0.F

References (8)

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