Vim <9.2.0842 Socket Server FD Overflow Stack Corruption
CVE-2026-73070 Published on August 11, 2026
Vim: Stack Buffer Overflow in the Vim Socket Server
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 Analysis
CVE-2026-73070 is exploitable with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a Stack Overflow Vulnerability?
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
CVE-2026-73070 has been classified to as a Stack Overflow vulnerability or weakness.
Products Associated with CVE-2026-73070
Want to know whenever a new CVE is published for Vim? stack.watch will email you.
