CVE-2026-32249

Editor crash via malformed NFA range compilation

Published Mar 12, 2026 · Updated Mar 12, 2026

NULL pointer dereference in Vim 9.1.0011 through 9.2.0136 allows local users to crash the editor via a crafted NFA regex. The NFA compiler emits a range endpoint’s combining bytes as separate states, corrupting the postfix stack before nfa_max_width() follows a NULL out1 pointer. Exploitation requires a user or process to supply and evaluate the crafted pattern, interrupting only that Vim process.

CVSS severity5.3
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Vim 9.1.0011 through 9.2.0136 allows local users to crash the editor via a crafted NFA regex. The NFA compiler emits a range endpoint’s combining bytes as separate states, corrupting the postfix stack before nfa_max_width() follows a NULL out1 pointer. Exploitation requires a user or process to supply and evaluate the crafted pattern, interrupting only that Vim process.

The record

CVE
CVE-2026-32249
Published
Mar 12, 2026
Updated
Mar 12, 2026
Vendor
Vim
Product
Vim
Classifications
CWE-476, T1204
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Mar 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 9.1.0011, < 9.2.0137

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Vim · Vimversion=>= 9.1.0011, < 9.2.0137

Published CVSS scores

5.3GitHub, Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1204User Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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