{"id":"CVE-2021-3974","title":"vim is vulnerable to Use After Free","summary":"vim is vulnerable to Use After Free","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-416"],"vendor":"vim","product":"vim","affected":["vim < 8.2.3612","fedora = 34","fedora = 35","debian_linux = 9.0","debian_linux = 10.0"],"patched":["vim 8.2.3612"],"published":"2021-11-19","updated":"2026-10-08","sourceUpdated":"2026-10-08T21:17:41.590","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-3974","references":[{"url":"http://www.openwall.com/lists/oss-security/2022/01/15/1","label":"security@huntr.dev"},{"url":"https://github.com/vim/vim/commit/64066b9acd9f8cffdf4840f797748f938a13f2d6","label":"security@huntr.dev"},{"url":"https://huntr.dev/bounties/e402cb2c-8ec4-4828-a692-c95f8e0de6d4","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/FNXY7T5OORA7UJIMGSJBGHFMU6UZWS6P/","label":"security@huntr.dev"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IH2LS2DXBTYOCWGAKFMBF3HTWWXPBEFL/","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/64066b9acd9f8cffdf4840f797748f938a13f2d6","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://huntr.dev/bounties/e402cb2c-8ec4-4828-a692-c95f8e0de6d4","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/FNXY7T5OORA7UJIMGSJBGHFMU6UZWS6P/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IH2LS2DXBTYOCWGAKFMBF3HTWWXPBEFL/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/202208-32","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-3974.json"},{"url":"https://access.redhat.com/security/cve/CVE-2021-3974"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2025061"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-3974"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3974"}],"tags":["nvd","csaf","vex","red-hat","score-dispute"],"epss":0.01363,"epssPercentile":0.70943,"ingestedAt":"2026-10-08T22:11:53.743Z","scores":{"nvd":7.8,"vendor":2.9},"slug":"CVE-2021-3974","body":"## Overview\n\nvim is vulnerable to Use After Free\n\n## Affected\n\n- `vim < 8.2.3612`\n- `fedora = 34`\n- `fedora = 35`\n- `debian_linux = 9.0`\n- `debian_linux = 10.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `vim 8.2.3612`\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-10-08 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-3974.json)","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0.3,"exploitation":0,"ransomware":0},"changes":[]}