CVEvulnerability
CVE-2021-36087
3.3 LOW
Official page ↗
- Status
- Modified
- Published
- 2021-07-01
- Last modified
- 2026-10-14
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 3.3 LOW — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
- CVSS 2.0 ([email protected])
- 2.1 LOW — AV:L/AC:L/Au:N/C:N/I:N/A:P
- Weaknesses
- CWE-125
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.
Affected configurations
• selinux project selinux 3.2
• fedoraproject fedora 35
Related
Weakness · CWE (1)
- CWE-125 Out-of-bounds Read weakness
References
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32675 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/SELinuxProject/selinux/commit/340f0eb7f3673e8aacaf0a96cbfcd4d12a405521 Patch, Third Party Advisory
- https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-585.yaml Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U7ZYR3PIJ75N6U2IONJWCKZ5L2NKJTGR/ lists.fedoraproject.org
- https://lore.kernel.org/selinux/CAEN2sdqJKHvDzPnxS-J8grU8fSf32DDtx=kyh84OsCq_Vm+yaQ%40mail.gmail.com/T/ lore.kernel.org
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32675 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/SELinuxProject/selinux/commit/340f0eb7f3673e8aacaf0a96cbfcd4d12a405521 Patch, Third Party Advisory
- https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-585.yaml Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2024/10/msg00021.html lists.debian.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U7ZYR3PIJ75N6U2IONJWCKZ5L2NKJTGR/ lists.fedoraproject.org
- https://lore.kernel.org/selinux/CAEN2sdqJKHvDzPnxS-J8grU8fSf32DDtx=kyh84OsCq_Vm+yaQ%40mail.gmail.com/T/ lore.kernel.org
- https://security.netapp.com/advisory/ntap-20250207-0004/ security.netapp.com
- https://cert-portal.siemens.com/productcert/html/ssa-202008.html cert-portal.siemens.com
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html cert-portal.siemens.com