Low severity3.3NVD Advisory· Published Jul 1, 2021· Updated Jun 17, 2026
CVE-2021-36087
CVE-2021-36087
Description
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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
7- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
cpe:2.3:o:selinux_project:selinux:3.2:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:selinux_project:selinux:3.2:*:*:*:*:*:*:*
- (no CPE)range: 3.2
- SELinux/SELinuxdescription
- osv-coords3 versions
< 2.9-3.el8+ 2 more
- (no CPE)range: < 2.9-3.el8
- (no CPE)range: < 2.9-3.el8
- (no CPE)range: < 2.9-3.el8
Patches
Vulnerability mechanics
References
7- github.com/SELinuxProject/selinux/commit/340f0eb7f3673e8aacaf0a96cbfcd4d12a405521nvdPatchThird Party Advisory
- bugs.chromium.org/p/oss-fuzz/issues/detailnvdExploitIssue TrackingPatchThird Party Advisory
- github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-585.yamlnvdThird Party Advisory
- lists.debian.org/debian-lts-announce/2024/10/msg00021.htmlnvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U7ZYR3PIJ75N6U2IONJWCKZ5L2NKJTGR/nvd
- lore.kernel.org/selinux/CAEN2sdqJKHvDzPnxS-J8grU8fSf32DDtx=kyh84OsCq_Vm+yaQ%40mail.gmail.com/T/nvd
- security.netapp.com/advisory/ntap-20250207-0004/nvd
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