CVE-2023-0512 Divide By Zero in vim/vim

High 7.3 Published 26 Jan 2023 Updated 31 Mar 2025

A divide by zero error in Vim allows attackers to cause a denial of service condition.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2023-0512?

CVE-2023-0512 is a high-severity denial of service vulnerability in Vim Vim, published on 26 Jan 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

Divide By Zero in GitHub repository vim/vim prior to 9.0.1247.

Weakness: CWE-369

Which versions are affected by CVE-2023-0512?

It affects 1 product.

Products include Vim Vim.

How do I fix CVE-2023-0512?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2023-0512 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-0512 exists.

All Vim Vim vulnerabilities

Sources

Also known as ALPINE-CVE-2023-0512, AZL-13233, BELL-CVE-2023-0512, DEBIAN-CVE-2023-0512, GHSA-whp8-xgvp-xj3v.