CVE-2023-4750Public exploit

Editor crash via invalid quickfix buffer access

Published Sep 4, 2023 · Updated Jun 23, 2026

Use-after-free in Vim before 9.0.1857 allows local users to crash the editor by processing a crafted quickfix command sequence. is_qf_win() checks a window's buffer type without first confirming that an autocommand-triggered buffer change left the pointer valid. The demonstrated sequence crashes Vim; exploitation requires Vim to process attacker-controlled quickfix commands.

CVSS severity7.8
High
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Vim before 9.0.1857 allows local users to crash the editor by processing a crafted quickfix command sequence. is_qf_win() checks a window's buffer type without first confirming that an autocommand-triggered buffer change left the pointer valid. The demonstrated sequence crashes Vim; exploitation requires Vim to process attacker-controlled quickfix commands.

The record

CVE
CVE-2023-4750
Published
Sep 4, 2023
Updated
Jun 23, 2026
Vendor
Vim
Product
Vim
Classifications
CWE-416, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 4, 2023CVE publishedPublication date reported by the CVE source.
  2. Jun 23, 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=unspecified <9.0.1857

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Vim · Vimversion=unspecified <9.0.1857

Published CVSS scores

7.8huntr.devCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
T1203Exploitation for Client Execution

Public exploit references

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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