CVE-2022-1733

Editor crash via C-indentation out-of-bounds read

Published May 17, 2022 · Updated Aug 3, 2024

Heap-based buffer overflow in Vim before 8.2.4968 allows local users to crash the editor through crafted C-indentation input. The skip_string function in src/cindent.c reads p[i] after a digit-scanning loop reaches the terminating NUL, so C-indentation reads past the allocated line buffer. Reaching the flaw requires local execution of Vim and triggering C-indentation; published evidence demonstrates a crash, not code execution or data modification.

CVSS severity6.6
Medium
EPSS probability0.61%
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 8.2.4968 allows local users to crash the editor through crafted C-indentation input. The skip_string function in src/cindent.c reads p[i] after a digit-scanning loop reaches the terminating NUL, so C-indentation reads past the allocated line buffer. Reaching the flaw requires local execution of Vim and triggering C-indentation; published evidence demonstrates a crash, not code execution or data modification.

The record

CVE
CVE-2022-1733
Published
May 17, 2022
Updated
Aug 3, 2024
Vendor
Vim
Product
Vim
Classifications
CWE-787, CWE-122
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. May 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 <8.2.4968

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Vim · Vimversion=unspecified <8.2.4968

Published CVSS scores

6.6huntr.devCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-122Heap-based Buffer Overflow

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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