CVE-2022-3705Network attack vector

Editor crash via reentrant FileType autocommand

Published Oct 26, 2022 · Updated Apr 15, 2025

Use-after-free in Vim before 9.0.0805 allows context-dependent attackers to crash the editor through a FileType autocommand. The qf_update_buffer function invokes FileType autocommands while filling a quickfix or location-list buffer without marking the list busy, allowing callback-driven list replacement to free memory that the update still uses. Triggering requires a FileType autocommand that mutates the active list; the documented consequence is a CLI process crash.

CVSS severity7.5
High
EPSS probability1.33%
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 9.0.0805 allows context-dependent attackers to crash the editor through a FileType autocommand. The qf_update_buffer function invokes FileType autocommands while filling a quickfix or location-list buffer without marking the list busy, allowing callback-driven list replacement to free memory that the update still uses. Triggering requires a FileType autocommand that mutates the active list; the documented consequence is a CLI process crash.

The record

CVE
CVE-2022-3705
Published
Oct 26, 2022
Updated
Apr 15, 2025
Vendor
Vim
Product
Vim
Classifications
CWE-416, CWE-119
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 26, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 2025Record 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=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Vim · Vimversion=n/a

Published CVSS scores

5.0VulDBCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
7.5NIST NVDCVSS:3.1/AV:N/AC:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer

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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