CVE-2026-28420 — Heap-based Buffer Overflow in VIM

CWE-122 — Heap-based Buffer OverflowCWE-125 — Out-of-bounds Read10 documents9 sources
Severity
4.4MEDIUMNVD
OSV6.6
EPSS
0.0%
top 99.76%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
VIMDebian VIMMsrc Azl3 VIM 9.1.1616-1 ON Azure Linux 3.0+1 more
Timeline
PublishedFeb 27
Latest updateApr 16

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.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:LExploitability: 1.8 | Impact: 2.5

Affected Packages6 packages

▶NVDvim/vim< 9.2.0076
▶debiandebian/vim< vim 2:9.2.0119-1 (forky)
▶Debianvim/vim< 2:9.2.0119-1
▶Ubuntuvim/vim< 2:8.2.3995-1ubuntu2.26+6

Patches

Patch: github.com ↗Patch: github.com ↗Patch: www.openwall.com ↗

🔴Vulnerability Details

3
VulDB
vim up to 9.2.0075 heap-based overflow (GHSA-rvj2-jrf9-2phg / EUVD-2026-9088)↗2026-04-16
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OSV
vim vulnerabilities↗2026-03-16
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OSV
CVE-2026-28420: Vim is an open source, command line text editor↗2026-02-27
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📋Vendor Advisories

4
Ubuntu
Vim vulnerabilities↗2026-03-16
▶
Red Hat
vim: Vim: Information disclosure and denial of service via crafted Unicode characters in terminal emulator↗2026-02-27
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Microsoft
Vim has Heap-based Buffer Overflow and OOB Read in :terminal↗2026-02-10
▶
Debian
CVE-2026-28420: vim - Vim is an open source, command line text editor. Prior to version 9.2.0076, a he...↗2026
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🕵️Threat Intelligence

1
Wiz
CVE-2026-28420 Impact, Exploitability, and Mitigation Steps | Wiz↗
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💬Community

1
Bugzilla
CVE-2026-28420 vim: Vim: Information disclosure and denial of service via crafted Unicode characters in terminal emulator↗2026-02-27
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CVE-2026-28420 — Heap-based Buffer Overflow in VIM | cvebase