Buffer overflow in Vim
CVE-2026-73070
Vim is an open source, command line text editor. Prior to 9.2.0842, the socket server backend in src/socketserver.c accepts unbounded client connections in socketserver_accept(), causing descriptors to overflow fd_set structures in src/channel.c and fixed-size struct pollfd arrays in src/os_unix.c, which allows a local process that can connect to the server socket to corrupt stack memory or terminate the Vim server. This issue is fixed in version 9.2.0842.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (7.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 7.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.001
Affected products
- Vim — versions < 9.2.0842
Weakness classification (CWE)
References
- github.com/vim/vim/security/advisories/GHSA-49m8-wwxj-mr69 (Patch, Vendor Advisory)
- github.com/vim/vim/commit/5598618b2daf8e36b3bf0251caaefcf0bf8e85e4 (Patch)
- github.com/vim/vim/releases/tag/v9.2.0842 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-73070?
- CVE-2026-73070 is a medium-severity vulnerability in Vim, classified under Stack-based Buffer Overflow. CVSS score: 5.5/10. Published 2026-08-11.
- How severe is CVE-2026-73070?
- Medium severity. CVSS v3 base score is 5.5 out of 10.