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.
https://github.com/vim/vim/security/advisories/GHSA-49m8-wwxj-mr69
https://github.com/vim/vim/releases/tag/v9.2.0842
https://github.com/vim/vim/commit/5598618b2daf8e36b3bf0251caaefcf0bf8e85e4
Published: 2026-08-11
Updated: 2026-08-11
Base Score: 3.3
Vector: CVSS2#AV:L/AC:M/Au:N/C:P/I:N/A:P
Severity: Low
Base Score: 5.5
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Severity: Medium
Base Score: 6.8
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
Severity: Medium
EPSS: 0.00111