CVE-2023-5344 Heap-based Buffer Overflow in vim/vim

Medium 4.0 Published 2 Oct 2023 Updated 3 Nov 2025

A heap-based buffer overflow in Vim allows attackers to execute arbitrary code or cause a denial of service via crafted input.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2023-5344?

CVE-2023-5344 is a medium-severity memory corruption vulnerability in Fedoraproject Fedora, published on 2 Oct 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Heap-based Buffer Overflow in GitHub repository vim/vim prior to 9.0.1969.

Weakness: CWE-787, CWE-122

Which versions are affected by CVE-2023-5344?

It affects 2 products.

Products include Fedoraproject Fedora, Vim Vim.

How do I fix CVE-2023-5344?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2023-5344 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-5344 exists.

All Fedoraproject Fedora vulnerabilities

Sources

Also known as ALPINE-CVE-2023-5344, AZL-31041, BELL-CVE-2023-5344, DEBIAN-CVE-2023-5344, GHSA-xhr4-fjfq-6r46, OESA-2023-1721 and 1 more.