Vim: Stack Buffer Overflow in the Vim Socket Server (CVE-2026-73070) | HOL Guard CVE

Medium · CVSS 6.8CVE-2026-73070

Vim: Stack Buffer Overflow in the Vim Socket Server

Answer in brief

CVE-2026-73070 records a Medium severity (CVSS 6.8) vulnerability in Vim: Stack Buffer Overflow in the Vim Socket Server. The current sources do not mark it as known exploited. The current feed maps vim/vim (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 11, 2026Updated Sep 18, 2026Source checked Sep 25, 2026First seen by HOL Aug 11, 2026Material review Sep 18, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.8
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 6.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps vim/vim (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:a:vim:vim::::::::	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
vim/vimgeneric	<9.2.0842	9.2.0842

Recommended response

Check inventory. Check lockfiles and deployed manifests for vim/vim.
Review the reported fix. Update vim/vim to 9.2.0842 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 18, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 11, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.