CVE-2023-48236

Editor crash via unchecked z= command count

Published Nov 16, 2023 · Updated Jun 23, 2026

Integer overflow in Vim before 9.0.2111 allows local users to crash the editor by entering an oversized count with the z= command. The get_number function multiplies the accumulated decimal count by 10 without first ensuring that the value remains within INT_MAX. A user must interact with Vim or run untrusted input in script mode, and the crash does not occur in every execution.

CVSS severity2.8
Low
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Integer overflow in Vim before 9.0.2111 allows local users to crash the editor by entering an oversized count with the z= command. The get_number function multiplies the accumulated decimal count by 10 without first ensuring that the value remains within INT_MAX. A user must interact with Vim or run untrusted input in script mode, and the crash does not occur in every execution.

The record

CVE
CVE-2023-48236
Published
Nov 16, 2023
Updated
Jun 23, 2026
Vendor
Vim
Product
Vim
Classifications
CWE-190
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 16, 2023CVE publishedPublication date reported by the CVE source.
  2. Jun 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 9.0.2111

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Vim · Vimversion=< 9.0.2111

Published CVSS scores

2.8GitHubCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo