{"id":"CVE-2021-3973","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 < 8.2.3611","fedora = 34","fedora = 35","debian_linux = 9.0"],"patched":["vim 8.2.3611"],"published":"2021-11-19","updated":"2026-10-08","sourceUpdated":"2026-10-08T22:17:12.067","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-3973","references":[{"url":"http://www.openwall.com/lists/oss-security/2022/01/15/1","label":"security@huntr.dev"},{"url":"https://github.com/vim/vim/commit/615ddd5342b50a6878a907062aa471740bd9a847","label":"security@huntr.dev"},{"url":"https://huntr.dev/bounties/ce6e8609-77c6-4e17-b9fc-a2e5abed052e","label":"security@huntr.dev"},{"url":"https://lists.debian.org/debian-lts-announce/2022/03/msg00018.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/615ddd5342b50a6878a907062aa471740bd9a847","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://huntr.dev/bounties/ce6e8609-77c6-4e17-b9fc-a2e5abed052e","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.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"}],"tags":["nvd"],"epss":0.01786,"epssPercentile":0.77655,"ingestedAt":"2026-10-08T23:16:47.326Z","slug":"CVE-2021-3973","body":"## Overview\n\nvim is vulnerable to Heap-based Buffer Overflow\n\n## Affected\n\n- `vim < 8.2.3611`\n- `fedora = 34`\n- `fedora = 35`\n- `debian_linux = 9.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `vim 8.2.3611`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0.4,"exploitation":0,"ransomware":0},"changes":[]}