CVE-2022-3234Public exploit

Process memory corruption via virtualedit replacement

Published Sep 17, 2022 · Updated Aug 3, 2024

Heap-based buffer overflow in Vim before 9.0.0483 allows local users to corrupt process memory through an interactive replace operation. In src/ops.c, op_replace writes a replacement byte over the NUL terminator when virtualedit positions the cursor just after a tab, extending the write beyond the allocated line buffer. Triggering requires user interaction with a crafted editing sequence in virtualedit mode; the upstream reproducer establishes memory corruption rather than a specific code-execution outcome.

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

Heap-based buffer overflow in Vim before 9.0.0483 allows local users to corrupt process memory through an interactive replace operation. In src/ops.c, op_replace writes a replacement byte over the NUL terminator when virtualedit positions the cursor just after a tab, extending the write beyond the allocated line buffer. Triggering requires user interaction with a crafted editing sequence in virtualedit mode; the upstream reproducer establishes memory corruption rather than a specific code-execution outcome.

The record

CVE
CVE-2022-3234
Published
Sep 17, 2022
Updated
Aug 3, 2024
Vendor
Vim
Product
Vim
Classifications
CWE-787, CWE-122, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 17, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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 <9.0.0483

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Vim · Vimversion=unspecified <9.0.0483

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8huntr.devCVSS:3.0/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-787Out-of-bounds Write
CWE-122Heap-based Buffer Overflow
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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