{"id":"CVE-2020-7463","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-7463","generatedAt":"2026-10-27T23:33:36.219Z","title":"In FreeBSD 12.1-STABLE before r364644, 11.4-STABLE before r364651, 12.1-RELEASE before p9, 11.4-RELEASE before p3, and 11.3-RELEASE before p13, improper handling in the kernel causes a use-after-free bug by sending large user messages from multiple…","description":"In FreeBSD 12.1-STABLE before r364644, 11.4-STABLE before r364651, 12.1-RELEASE before p9, 11.4-RELEASE before p3, and 11.3-RELEASE before p13, improper handling in the kernel causes a use-after-free bug by sending large user messages from multiple threads on the same SCTP socket. The use-after-free situation may result in unintended kernel behaviour including a kernel panic.","published":"2021-03-26T21:15:13.000Z","lastModified":"2026-06-17T03:24:50.000Z","status":"Modified","sourceIdentifier":"secteam@freebsd.org","cvss":{"version":"3.1","score":5.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-416"],"affected":["freebsd/freebsd","apple/icloud","apple/itunes","apple/safari","apple/ipados","apple/iphone os","apple/macos","apple/tvos","apple/watchos"],"epss":{"score":0.00399,"percentile":0.33913,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.40%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://seclists.org/fulldisclosure/2021/Apr/49","tags":["Mailing List","Third Party Advisory"],"source":"secteam@freebsd.org"},{"url":"http://seclists.org/fulldisclosure/2021/Apr/50","tags":["Mailing List","Third Party Advisory"],"source":"secteam@freebsd.org"},{"url":"http://seclists.org/fulldisclosure/2021/Apr/57","tags":["Mailing List","Third Party Advisory"],"source":"secteam@freebsd.org"},{"url":"http://seclists.org/fulldisclosure/2021/Apr/58","tags":["Mailing List","Third Party Advisory"],"source":"secteam@freebsd.org"},{"url":"http://seclists.org/fulldisclosure/2021/Apr/59","tags":["Mailing List","Third Party Advisory"],"source":"secteam@freebsd.org"},{"url":"https://security.FreeBSD.org/advisories/FreeBSD-SA-20:25.sctp.asc","tags":["Vendor Advisory"],"source":"secteam@freebsd.org"},{"url":"https://support.apple.com/kb/HT212317","tags":["Third Party Advisory"],"source":"secteam@freebsd.org"},{"url":"https://support.apple.com/kb/HT212318","tags":["Third Party Advisory"],"source":"secteam@freebsd.org"},{"url":"https://support.apple.com/kb/HT212319","tags":["Third Party Advisory"],"source":"secteam@freebsd.org"},{"url":"https://support.apple.com/kb/HT212321","tags":["Third Party Advisory"],"source":"secteam@freebsd.org"},{"url":"https://support.apple.com/kb/HT212323","tags":["Third Party Advisory"],"source":"secteam@freebsd.org"},{"url":"https://support.apple.com/kb/HT212324","tags":["Third Party Advisory"],"source":"secteam@freebsd.org"},{"url":"https://support.apple.com/kb/HT212325","tags":["Third Party Advisory"],"source":"secteam@freebsd.org"},{"url":"http://seclists.org/fulldisclosure/2021/Apr/49","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://seclists.org/fulldisclosure/2021/Apr/50","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://seclists.org/fulldisclosure/2021/Apr/57","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://seclists.org/fulldisclosure/2021/Apr/58","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://seclists.org/fulldisclosure/2021/Apr/59","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.FreeBSD.org/advisories/FreeBSD-SA-20:25.sctp.asc","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/kb/HT212317","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/kb/HT212318","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/kb/HT212319","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/kb/HT212321","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/kb/HT212323","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/kb/HT212324","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/kb/HT212325","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-7463","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}