CVE-2021-3984

Name: CVE-2021-3984
Creator: NVD / NIST
Published: 2021-12-01T11:15:07.797+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 1.46%

Last modified Jun 17, 2026

CVE-2021-3984 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. vim is vulnerable to Heap-based Buffer Overflow. EPSS estimates a 1.46% chance of exploitation in the next 30 days.

Description

vim is vulnerable to Heap-based Buffer Overflow

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

1.46%

70.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Vim	Vim	< 8.2.3625
Fedoraproject	Fedora	34
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0

References

http://www.openwall.com/lists/oss-security/2022/01/15/1Mailing List, Third Party Advisory
https://github.com/vim/vim/commit/2de9b7c7c8791da8853a9a7ca9c467867465b655Patch, Third Party Advisory
https://huntr.dev/bounties/b114b5a2-18e2-49f0-b350-15994d71426aExploit, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00018.htmlMitigation, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/11/msg00009.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FNXY7T5OORA7UJIMGSJBGHFMU6UZWS6P/
https://security.gentoo.org/glsa/202208-32Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/01/15/1Mailing List, Third Party Advisory
https://github.com/vim/vim/commit/2de9b7c7c8791da8853a9a7ca9c467867465b655Patch, Third Party Advisory
https://huntr.dev/bounties/b114b5a2-18e2-49f0-b350-15994d71426aExploit, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00018.htmlMitigation, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/11/msg00009.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FNXY7T5OORA7UJIMGSJBGHFMU6UZWS6P/
https://security.gentoo.org/glsa/202208-32Third Party Advisory

Timeline

Published: Dec 1, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3984?

vim is vulnerable to Heap-based Buffer Overflow

How severe is CVE-2021-3984?

CVE-2021-3984 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.46% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3984?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-3984?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST