---
id: CVE-2023-0433
title: Heap-based Buffer Overflow in GitHub repository vim/vim prior to 9.0.1225.
summary: Heap-based Buffer Overflow in GitHub repository vim/vim prior to 9.0.1225.
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-122
vendor: neovim
product: neovim
affected:
  - macos < 11.7.5
  - 'macos >= 12.0.0, < 12.6.4'
  - 'macos >= 13.0, < 13.3'
  - fedora = 36
  - fedora = 37
  - 'neovim >= 0.1.0, < 0.8.3'
  - vim < 9.0.1225
patched:
  - macos 13.3
  - neovim 0.8.3
  - vim 9.0.1225
published: '2023-01-21'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T15:54:56.850'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-0433'
references:
  - url: 'http://seclists.org/fulldisclosure/2023/Mar/17'
    label: security@huntr.dev
  - url: 'http://seclists.org/fulldisclosure/2023/Mar/18'
    label: security@huntr.dev
  - url: 'http://seclists.org/fulldisclosure/2023/Mar/21'
    label: security@huntr.dev
  - url: 'https://github.com/vim/vim/commit/11977f917506d950b7e0cae558bd9189260b253b'
    label: security@huntr.dev
  - url: 'https://huntr.dev/bounties/ae933869-a1ec-402a-bbea-d51764c6618e'
    label: security@huntr.dev
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4EX6N2DB75A73MQGVW3CS4VTNPAYVM2M/
    label: security@huntr.dev
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PZWIJBSQX53P7DHV77KRXJIXA4GH7XHC/
    label: security@huntr.dev
  - url: 'https://support.apple.com/kb/HT213670'
    label: security@huntr.dev
  - url: 'https://support.apple.com/kb/HT213675'
    label: security@huntr.dev
  - url: 'https://support.apple.com/kb/HT213677'
    label: security@huntr.dev
  - url: 'http://seclists.org/fulldisclosure/2023/Mar/17'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://seclists.org/fulldisclosure/2023/Mar/18'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://seclists.org/fulldisclosure/2023/Mar/21'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://github.com/vim/vim/commit/11977f917506d950b7e0cae558bd9189260b253b'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://huntr.dev/bounties/ae933869-a1ec-402a-bbea-d51764c6618e'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4EX6N2DB75A73MQGVW3CS4VTNPAYVM2M/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PZWIJBSQX53P7DHV77KRXJIXA4GH7XHC/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://support.apple.com/kb/HT213670'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://support.apple.com/kb/HT213675'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://support.apple.com/kb/HT213677'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00555
epssPercentile: 0.45147
ingestedAt: '2026-09-24T16:47:15.808Z'
---

## Overview

Heap-based Buffer Overflow in GitHub repository vim/vim prior to 9.0.1225.

## Affected

- `macos < 11.7.5`
- `macos >= 12.0.0, < 12.6.4`
- `macos >= 13.0, < 13.3`
- `fedora = 36`
- `fedora = 37`
- `neovim >= 0.1.0, < 0.8.3`
- `vim < 9.0.1225`

## Remediation

Upgrade past the affected range:

- `macos 13.3`
- `neovim 0.8.3`
- `vim 9.0.1225`