---
id: CVE-2021-4136
title: vim is vulnerable to Heap-based Buffer Overflow
summary: vim is vulnerable to Heap-based Buffer Overflow
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
  - CWE-787
vendor: vim
product: vim
affected:
  - vim < 8.2.3847
  - fedora = 34
  - fedora = 35
  - 'mac_os_x >= 10.15, < 10.15.7'
  - mac_os_x = 10.15.7
  - 'macos >= 11.0, < 11.6.6'
  - 'macos >= 12.0, < 12.3'
patched:
  - vim 8.2.3847
  - mac_os_x 10.15.7
  - macos 12.3
published: '2021-12-19'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T22:17:14.317'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-4136'
references:
  - url: 'http://seclists.org/fulldisclosure/2022/Jul/14'
    label: security@huntr.dev
  - url: 'http://seclists.org/fulldisclosure/2022/Mar/29'
    label: security@huntr.dev
  - url: 'http://seclists.org/fulldisclosure/2022/May/35'
    label: security@huntr.dev
  - url: 'http://www.openwall.com/lists/oss-security/2022/01/15/1'
    label: security@huntr.dev
  - url: 'https://github.com/vim/vim/commit/605ec91e5a7330d61be313637e495fa02a6dc264'
    label: security@huntr.dev
  - url: 'https://huntr.dev/bounties/5c6b93c1-2d27-4e98-a931-147877b8c938'
    label: security@huntr.dev
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2EY2VFBU3YGGWI5BW4XKT3F37MYGEQUD/
    label: security@huntr.dev
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3FH2J57GDA2WMBS6J56F6QQRA6BXQQFZ/
    label: security@huntr.dev
  - url: 'https://security.gentoo.org/glsa/202208-32'
    label: security@huntr.dev
  - url: 'https://support.apple.com/kb/HT213183'
    label: security@huntr.dev
  - url: 'https://support.apple.com/kb/HT213256'
    label: security@huntr.dev
  - url: 'https://support.apple.com/kb/HT213343'
    label: security@huntr.dev
  - url: 'http://seclists.org/fulldisclosure/2022/Jul/14'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://seclists.org/fulldisclosure/2022/Mar/29'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://seclists.org/fulldisclosure/2022/May/35'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.openwall.com/lists/oss-security/2022/01/15/1'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://github.com/vim/vim/commit/605ec91e5a7330d61be313637e495fa02a6dc264'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://huntr.dev/bounties/5c6b93c1-2d27-4e98-a931-147877b8c938'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2EY2VFBU3YGGWI5BW4XKT3F37MYGEQUD/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3FH2J57GDA2WMBS6J56F6QQRA6BXQQFZ/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.gentoo.org/glsa/202208-32'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://support.apple.com/kb/HT213183'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://support.apple.com/kb/HT213256'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://support.apple.com/kb/HT213343'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.01831
epssPercentile: 0.78233
ingestedAt: '2026-10-08T23:16:47.328Z'
---

## Overview

vim is vulnerable to Heap-based Buffer Overflow

## Affected

- `vim < 8.2.3847`
- `fedora = 34`
- `fedora = 35`
- `mac_os_x >= 10.15, < 10.15.7`
- `mac_os_x = 10.15.7`
- `macos >= 11.0, < 11.6.6`
- `macos >= 12.0, < 12.3`

## Remediation

Upgrade past the affected range:

- `vim 8.2.3847`
- `mac_os_x 10.15.7`
- `macos 12.3`