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TI-2026-51277 Aliases CVE-2026-73070

Vim: Stack Buffer Overflow in the Vim Socket Server

Priority LOW 29CWE-121Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 1 fixed, 7 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-121 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00186 8th percentileScored 2026-11-07
Fix Partial vim (vim): 9.2.0842Red Hat: 1 advisoryRed Hat: 1 fixed, 7 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
vimvimbefore 9.2.08429.2.0842Patch availableCNA
  • vim Vendorvim Affected before 9.2.0842 Fixed in 9.2.0842 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:vim:vim:*:*:*:*:*:*:*:*9.2.0512 to before 9.2.0842Vulnerablevim
  • cpe:2.3:a:vim:vim:*:*:*:*:*:*:*:* Versions 9.2.0512 to before 9.2.0842 Vulnerable ·vim

Remediation

  • Fix · CNA vim (vim) Fixed in 9.2.0842

Red Hat 1 advisory

  • RHSA-2026:56636 Released 2026-08-19 · Red Hat rating Moderate
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images vim-2:9.2.967-1.hum1@src, vim-X11-2:9.2.967-1.hum1@aarch64, vim-X11-2:9.2.967-1.hum1@x86_64 +14

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 10Affected—
Red Hat Enterprise Linux 6Affected—
Red Hat Enterprise Linux 7Affected—
Red Hat Enterprise Linux 8Affected—
Red Hat Enterprise Linux 9Affected—
Red Hat OpenShift Container Platform 4AffectedNo fix yet: Fix deferred
Red Hat OpenShift Container Platform 5AffectedNo fix yet: Fix deferred
Red Hat Hardened ImagesFixed RHSA-2026:56636

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-73070
  2. 2026-10-30 Affected versions changed · Red Hat

References

Patch 2

Other 1

  • TI-2022-03248 Heap-based Buffer Overflow in vim/vim CVSS 3.1CRITICAL 9.8
  • TI-2024-15103 Vim before 9.0.2142 has a stack-based buffer overflow because did_set_langmap in map.c… CVSS 3.1HIGH 7.8
  • TI-2023-05093 Use After Free in vim/vim CVSS 3.1HIGH 7.8
  • TI-2023-04407 Heap-based Buffer Overflow in vim/vim CVSS 3.1HIGH 7.8
  • TI-2023-04379 Heap-based Buffer Overflow in vim/vim CVSS 3.1HIGH 7.8
  • TI-2023-04378 Use After Free in vim/vim CVSS 3.1HIGH 7.8
See all 258 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences