Vulnerability · Published Aug 11, 2026 · Assigned by GitHub_M

CVE-2026-73070Vim: Stack Buffer Overflow in the Vim Socket Server

Medium 6.8

In plain English

A medium-severity stack 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 8% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)6.8Medium

Exploit odds (30 days)0.2%top 91.8% 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 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Alpine:v3.23	vim	9.2.0854-r0	ALPINE-CVE-2026-73070
Alpine:v3.24	vim	9.2.0843-r0	ALPINE-CVE-2026-73070
Debian:12	vim	no fix listed	DEBIAN-CVE-2026-73070
Debian:13	vim	no fix listed	DEBIAN-CVE-2026-73070
Debian:14	vim	2:9.2.0858-1	DEBIAN-CVE-2026-73070
Ubuntu:22.04:LTS	vim	no fix listed	UBUNTU-CVE-2026-73070
Ubuntu:24.04:LTS	vim	no fix listed	UBUNTU-CVE-2026-73070
Ubuntu:26.04:LTS	vim	no fix listed	UBUNTU-CVE-2026-73070

Affected products (as reported)

Vendor	Product	Versions
vim	vim	< 9.2.0842

Weakness: CWE-121 · Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

References

https://github.com/vim/vim/security/advisories/GHSA-49m8-wwxj-mr69 x_refsource_CONFIRM
https://github.com/vim/vim/commit/5598618b2daf8e36b3bf0251caaefcf0bf8e85e4 x_refsource_MISC
https://github.com/vim/vim/releases/tag/v9.2.0842 x_refsource_MISC