{"id":"CVE-2021-3655","title":"A vulnerability was found in the Linux kernel in versions prior to v5.14-rc1","summary":"A vulnerability was found in the Linux kernel in versions prior to v5.14-rc1. Missing size validations on inbound SCTP packets may allow the kernel to read uninitialized memory.","severity":"low","cvss":3.3,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","cwe":["CWE-909","CWE-20"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel < 5.14","linux_kernel = 5.14","enterprise_linux = 8.0","debian_linux = 9.0"],"patched":["linux_kernel 5.14"],"published":"2021-08-05","updated":"2026-10-08","sourceUpdated":"2026-10-08T21:17:40.797","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-3655","references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1984024","label":"secalert@redhat.com"},{"url":"https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html","label":"secalert@redhat.com"},{"url":"https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1984024","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.00308,"epssPercentile":0.21655,"ingestedAt":"2026-10-08T22:11:53.739Z","slug":"CVE-2021-3655","body":"## Overview\n\nA vulnerability was found in the Linux kernel in versions prior to v5.14-rc1. Missing size validations on inbound SCTP packets may allow the kernel to read uninitialized memory.\n\n## Affected\n\n- `linux_kernel < 5.14`\n- `linux_kernel = 5.14`\n- `enterprise_linux = 8.0`\n- `debian_linux = 9.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 5.14`","depth":"sunlit","depthScore":18,"depthScoreParts":{"impact":18.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}