Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2021-3974

CVE-2021-3974HIGH

vim vim/vim — Use After Free in vim/vim

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   N   R  U  H  H  H    7.8   .0136   71.3     —

AFFECTED
  Product  Versions       Fixed
  vim/vim  unspecified –  —

TIMELINE
  Nov 17  Reserved by @huntrdev
  Nov 19  Published (CNA: @huntrdev)
  Oct 8   EXPLOIT PUBLISHED — CVE-2021-3974 (vim/vim). Public exploit reference added.
  Oct 8   RESCORED — CVE-2021-3974 (vim/vim). CVSS 7.3 → 7.8 (NVD).

CWE-416 · CNA: @huntrdev · CVSS v3.1 · 8 references · NVD status: Modified

Description

vim is vulnerable to Use After Free

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
November 17, 2021	Reserved	Reserved by @huntrdev
November 19, 2021	Published	Published (CNA: @huntrdev)
October 8, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2021-3974 (vim/vim). Public exploit reference added.
October 8, 2026	RESCORED	RESCORED — CVE-2021-3974 (vim/vim). CVSS 7.3 → 7.8 (NVD).

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
vim	vim/vim	—	unspecified	—

Weaknesses

CWE-416

References (8)

http://www.openwall.com/lists/oss-security/2022/01/15/1 [Mailing List, Third Party Advisory]
https://github.com/vim/vim/commit/64066b9acd9f8cffdf4840f797748f938a13f2d6 [Patch, Third Party Advisory]
https://huntr.dev/bounties/e402cb2c-8ec4-4828-a692-c95f8e0de6d4 [Exploit, Issue Tracking, Patch, Third Party Advisory]
https://lists.debian.org/debian-lts-announce/2022/03/msg00018.html [Mailing List, Third Party Advisory]
https://lists.debian.org/debian-lts-announce/2022/11/msg00009.html [Mailing List, Third Party Advisory]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FNXY7T5OORA7UJIMGSJBGHFMU6UZWS6P/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IH2LS2DXBTYOCWGAKFMBF3HTWWXPBEFL/
https://security.gentoo.org/glsa/202208-32 [Third Party Advisory]

Authoritative record: CVE-2021-3974 at cve.org

Vendors: vim

Weaknesses: CWE-416

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-3974 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.