Vulnerability · Published Feb 27, 2026 · Assigned by GitHub_M
CVE-2026-28420Vim has Heap-based Buffer Overflow and OOB Read in :terminal
Medium 4.4
In plain English
A medium-severity heap buffer overflow in vim from vim. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.4Medium
Exploit odds (30 days)0.2%top 89.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | vim-X11 | 2:9.1.083-9.el10_2.20 | ALSA-2026:66336 |
| AlmaLinux:8 | vim-X11 | 2:8.0.1763-31.el8_10.7 | ALSA-2026:66348 |
| AlmaLinux:9 | vim-X11 | 2:8.2.2637-26.el9_8.21 | ALSA-2026:66366 |
| AlmaLinux:10 | vim-common | 2:9.1.083-9.el10_2.20 | ALSA-2026:66336 |
| AlmaLinux:8 | vim-common | 2:8.0.1763-31.el8_10.7 | ALSA-2026:66348 |
| AlmaLinux:9 | vim-common | 2:8.2.2637-26.el9_8.21 | ALSA-2026:66366 |
| AlmaLinux:10 | vim-data | 2:9.1.083-9.el10_2.20 | ALSA-2026:66336 |
| AlmaLinux:10 | vim-enhanced | 2:9.1.083-9.el10_2.20 | ALSA-2026:66336 |
| AlmaLinux:8 | vim-enhanced | 2:8.0.1763-31.el8_10.7 | ALSA-2026:66348 |
| AlmaLinux:9 | vim-enhanced | 2:8.2.2637-26.el9_8.21 | ALSA-2026:66366 |
| AlmaLinux:10 | vim-filesystem | 2:9.1.083-9.el10_2.20 | ALSA-2026:66336 |
| AlmaLinux:8 | vim-filesystem | 2:8.0.1763-31.el8_10.7 | ALSA-2026:66348 |
| AlmaLinux:9 | vim-filesystem | 2:8.2.2637-26.el9_8.21 | ALSA-2026:66366 |
| AlmaLinux:10 | vim-minimal | 2:9.1.083-9.el10_2.20 | ALSA-2026:66336 |
| AlmaLinux:8 | vim-minimal | 2:8.0.1763-31.el8_10.7 | ALSA-2026:66348 |
| AlmaLinux:9 | vim-minimal | 2:8.2.2637-26.el9_8.21 | ALSA-2026:66366 |
| AlmaLinux:10 | xxd | 2:9.1.083-9.el10_2.20 | ALSA-2026:66336 |
| Alpine:v3.23 | vim | 9.2.0078-r0 | ALPINE-CVE-2026-28420 |
| Alpine:v3.24 | vim | 9.2.0078-r0 | ALPINE-CVE-2026-28420 |
| Debian:12 | vim | no fix listed | DEBIAN-CVE-2026-28420 |
| Debian:13 | vim | 2:9.1.1230-2+deb13u1 | DEBIAN-CVE-2026-28420 |
| Debian:14 | vim | 2:9.2.0119-1 | DEBIAN-CVE-2026-28420 |
| Rocky Linux:10 | vim | 2:9.1.083-9.el10_2.20 | RLSA-2026:66336 |
| Rocky Linux:8 | vim | 2:8.0.1763-31.el8_10.7 | RLSA-2026:66348 |
| Rocky Linux:9 | vim | 2:8.2.2637-26.el9_8.21 | RLSA-2026:66366 |
| Ubuntu:22.04:LTS | vim | 2:8.2.3995-1ubuntu2.26 | UBUNTU-CVE-2026-28420 |
| Ubuntu:24.04:LTS | vim | 2:9.1.0016-1ubuntu7.10 | UBUNTU-CVE-2026-28420 |
| Ubuntu:25.10 | vim | 2:9.1.0967-1ubuntu6.1 | UBUNTU-CVE-2026-28420 |
| Ubuntu:26.04:LTS | vim | 2:9.1.2141-1ubuntu2 | UBUNTU-CVE-2026-28420 |
Affected products (as reported)
Weakness: CWE-122, CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L