Buffer overflow in Vim
CVE-2026-28421
Vim is an open source, command line text editor. Versions prior to 9.2.0077 have a heap-buffer-overflow and a segmentation fault (SEGV) exist in Vim's swap file recovery logic. Both are caused by unvalidated fields read from crafted pointer blocks within a swap file. Version 9.2.0077 fixes the issue.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.002 (8.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 8.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Vim — versions < 9.2.0077
Weakness classification (CWE)
References
- github.com/vim/vim/security/advisories/GHSA-r2gw-2x48-jj5p (Patch, Vendor Advisory)
- github.com/vim/vim/commit/65c1a143c331c886dc28 (Patch)
- github.com/vim/vim/releases/tag/v9.2.0077 (Product)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-28421?
- CVE-2026-28421 is a medium-severity vulnerability in Vim, classified under Improper Input Validation. CVSS score: 5.3/10. Published 2026-02-27.
- How severe is CVE-2026-28421?
- Medium severity. CVSS v3 base score is 5.3 out of 10.