---
id: CVE-2021-3928
title: vim is vulnerable to Use of Uninitialized Variable
summary: vim is vulnerable to Use of Uninitialized Variable
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-457
  - CWE-908
vendor: vim
product: vim
affected:
  - vim < 8.2.3582
  - fedora = 33
  - fedora = 34
  - fedora = 35
  - debian_linux = 9.0
  - debian_linux = 10.0
patched:
  - vim 8.2.3582
published: '2021-11-05'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T22:17:11.720'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-3928'
references:
  - url: 'http://www.openwall.com/lists/oss-security/2022/01/15/1'
    label: security@huntr.dev
  - url: 'https://github.com/vim/vim/commit/15d9890eee53afc61eb0a03b878a19cb5672f732'
    label: security@huntr.dev
  - url: 'https://huntr.dev/bounties/29c3ebd2-d601-481c-bf96-76975369d0cd'
    label: security@huntr.dev
  - url: 'https://lists.debian.org/debian-lts-announce/2022/03/msg00018.html'
    label: security@huntr.dev
  - url: 'https://lists.debian.org/debian-lts-announce/2022/11/msg00009.html'
    label: security@huntr.dev
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BCQWPEY2AEYBELCMJYHYWYCD3PZVD2H7/
    label: security@huntr.dev
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FNXY7T5OORA7UJIMGSJBGHFMU6UZWS6P/
    label: security@huntr.dev
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PGW56Z6IN4UVM3E5RXXF4G7LGGTRBI5C/
    label: security@huntr.dev
  - url: 'https://security.gentoo.org/glsa/202208-32'
    label: security@huntr.dev
  - 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/15d9890eee53afc61eb0a03b878a19cb5672f732'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://huntr.dev/bounties/29c3ebd2-d601-481c-bf96-76975369d0cd'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2022/03/msg00018.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2022/11/msg00009.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BCQWPEY2AEYBELCMJYHYWYCD3PZVD2H7/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FNXY7T5OORA7UJIMGSJBGHFMU6UZWS6P/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PGW56Z6IN4UVM3E5RXXF4G7LGGTRBI5C/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.gentoo.org/glsa/202208-32'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00635
epssPercentile: 0.48843
ingestedAt: '2026-10-08T23:16:47.324Z'
---

## Overview

vim is vulnerable to Use of Uninitialized Variable

## Affected

- `vim < 8.2.3582`
- `fedora = 33`
- `fedora = 34`
- `fedora = 35`
- `debian_linux = 9.0`
- `debian_linux = 10.0`

## Remediation

Upgrade past the affected range:

- `vim 8.2.3582`