CVE-2022-1886Public exploit

Memory corruption via empty-register put underflow

Published May 26, 2022 · Updated Aug 3, 2024

Heap buffer overflow in Vim before 8.2.5016 allows local users to corrupt memory by inducing a victim to execute a crafted put command. In do_put(), an empty register yields a zero length, yet the code subtracts one and passes the resulting pre-buffer pointer to mb_head_off(). Exploitation requires user interaction inside a local Vim session and can overwrite memory or crash the editor process.

CVSS severity7.1
High
EPSS probability1.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in Vim before 8.2.5016 allows local users to corrupt memory by inducing a victim to execute a crafted put command. In do_put(), an empty register yields a zero length, yet the code subtracts one and passes the resulting pre-buffer pointer to mb_head_off(). Exploitation requires user interaction inside a local Vim session and can overwrite memory or crash the editor process.

The record

CVE
CVE-2022-1886
Published
May 26, 2022
Updated
Aug 3, 2024
Vendor
Vim
Product
Vim
Classifications
CWE-787, CWE-122
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 26, 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

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Vim · Vimversion=unspecified <8.2

Published CVSS scores

6.8NISTAV:N/AC:M/Au:N/C:P/I:P/A:P
7.8NISTCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.1huntr.devCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/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

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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