CVE-2022-1154Public exploit

Editor crash via freed regex buffer line

Published Mar 30, 2022 · Updated Aug 2, 2024

Use-after-free in Vim before 8.2.4646 allows context-dependent attackers to crash the editor by inducing a crafted substitution. The old backtracking regular-expression engine calls getmark_buf during substitution, which can free the current buffer line, then reuses stale rex.line and rex.input pointers. Exploitation requires a user to open attacker-controlled content; published evidence establishes a crash and memory corruption, not reliable code execution.

CVSS severity7.8
High
EPSS probability1.46%
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 8.2.4646 allows context-dependent attackers to crash the editor by inducing a crafted substitution. The old backtracking regular-expression engine calls getmark_buf during substitution, which can free the current buffer line, then reuses stale rex.line and rex.input pointers. Exploitation requires a user to open attacker-controlled content; published evidence establishes a crash and memory corruption, not reliable code execution.

The record

CVE
CVE-2022-1154
Published
Mar 30, 2022
Updated
Aug 2, 2024
Vendor
Vim
Product
Vim
Classifications
CWE-416, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 30, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record 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 <8.2.4646

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Vim · Vimversion=unspecified <8.2.4646

Published CVSS scores

7.8huntr.devCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
T1204.002Malicious File

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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