CVE-2022-1720

Editor crash via Visual-block gf out-of-bounds read

Published May 16, 2022 · Updated Aug 3, 2024

Out-of-bounds read in Vim before 8.2.4956 allows context-dependent attackers to crash the editor via crafted text and a Visual-block gf command. The get_visual_text path includes a trailing NUL in the selected length, causing grab_file_name to read beyond the line buffer. Exploitation requires a user to open attacker-controlled text, select through the line end in Visual block mode, and invoke gf; no network service is exposed.

CVSS severity7.8
High
EPSS probability2.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Vim before 8.2.4956 allows context-dependent attackers to crash the editor via crafted text and a Visual-block gf command. The get_visual_text path includes a trailing NUL in the selected length, causing grab_file_name to read beyond the line buffer. Exploitation requires a user to open attacker-controlled text, select through the line end in Visual block mode, and invoke gf; no network service is exposed.

The record

CVE
CVE-2022-1720
Published
May 16, 2022
Updated
Aug 3, 2024
Vendor
Vim
Product
Vim
Classifications
CWE-126, CWE-125, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 16, 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 <8.2.4956

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Vim · Vimversion=unspecified <8.2.4956

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.6huntr.devCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-126Buffer Over-read
CWE-125Out-of-bounds Read
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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