{"id":"CVE-2021-36087","details":"The CIL compiler in SELinux 3.2 has a heap-based buffer over-read in ebitmap_match_any (called indirectly from cil_check_neverallow). This occurs because there is sometimes a lack of checks for invalid statements in an optional block.","modified":"2026-03-15T22:41:07.240965Z","published":"2021-07-01T03:15:08.817Z","related":["ALSA-2021:4513","openSUSE-SU-2024:10990-1"],"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U7ZYR3PIJ75N6U2IONJWCKZ5L2NKJTGR/"},{"type":"WEB","url":"https://lore.kernel.org/selinux/CAEN2sdqJKHvDzPnxS-J8grU8fSf32DDtx=kyh84OsCq_Vm+yaQ%40mail.gmail.com/T/"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/10/msg00021.html"},{"type":"ADVISORY","url":"https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-585.yaml"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20250207-0004/"},{"type":"FIX","url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32675"},{"type":"FIX","url":"https://github.com/SELinuxProject/selinux/commit/340f0eb7f3673e8aacaf0a96cbfcd4d12a405521"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"3.2"}]},{"events":[{"introduced":"0"},{"last_affected":"35"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-36087.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"}]}