CVE-2026-73070

Vim: Stack Buffer Overflow in the Vim Socket Server

MEDIUM
5.5
CVSS Score
Published: August 11, 2026 at 03:21 PM UTC
Updated: October 29, 2026 at 03:55 PM UTC
1 product affected across 1 vendorVim

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

9.2.0512 ≤ v < 9.2.0842
Affected range stops below 9.2.0842, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (3)

x_refsource_CONFIRMPatchVendor Advisory
Source: cverecord
https://github.com/vim/vim/security/advisories/GHSA-49m8-wwxj-mr69
x_refsource_MISCProductRelease Notes
Source: cverecord
https://github.com/vim/vim/releases/tag/v9.2.0842

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-121

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