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.

PUBLISHED Reserved 2026-02-27 | Published 2026-02-27 | Updated 2026-02-28 | Assigner GitHub_M

Problem types

CWE-122: Heap-based Buffer Overflow

CWE-125: Out-of-bounds Read

Product status

References

www.openwall.com/lists/oss-security/2026/02/27/9

github.com/vim/vim/security/advisories/GHSA-rvj2-jrf9-2phg

github.com/vim/vim/commit/bb6de2105b160e729c34063

github.com/vim/vim/releases/tag/v9.2.0076

cve.org (CVE-2026-28420)

nvd.nist.gov (CVE-2026-28420)

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