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.
CSIRTS triage
- What
- A stack buffer overflow exists in the Vim socket server.
- Who is affected
- Vim instances running with socket server functionality enabled and accepting untrusted input.
- Urgency
- Unknown severity; assess impact promptly as buffer overflows may enable code execution.
- Action
- Check for and apply available Vim security updates.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.11% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all EPSS-scored CVEs.
Advisory coverage (2)
- unknownCVE-2026-73070: Vim is an open source, command line text editor. Prior to 9.2.0842, the socket server backend …nvd · 2026-08-11
- unknownCVE-2026-73070: Vim: Stack Buffer Overflow in the Vim Socket Servermsrc · 2026-08-11
External references
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[](https://www.csirts.com/cve/CVE-2026-73070)