Vulnerability Description
The CIL compiler in SELinux 3.2 has a use-after-free in __cil_verify_classperms (called from __cil_verify_classpermission and __cil_pre_verify_helper).
CVSS Score
3.3
LOW
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Selinux Project | Selinux | 3.2 |
| Fedoraproject | Fedora | 35 |
Related Weaknesses (CWE)
References
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31065ExploitIssue TrackingPatch
- https://github.com/SELinuxProject/selinux/commit/f34d3d30c8325e4847a6b696fe7a393PatchThird Party Advisory
- https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-417.yaThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31065ExploitIssue TrackingPatch
- https://github.com/SELinuxProject/selinux/commit/f34d3d30c8325e4847a6b696fe7a393PatchThird Party Advisory
- https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-417.yaThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2024/10/msg00021.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.netapp.com/advisory/ntap-20250207-0004/
FAQ
What is CVE-2021-36084?
CVE-2021-36084 is a vulnerability with a CVSS score of 3.3 (LOW). The CIL compiler in SELinux 3.2 has a use-after-free in __cil_verify_classperms (called from __cil_verify_classpermission and __cil_pre_verify_helper).
How severe is CVE-2021-36084?
CVE-2021-36084 has been rated LOW with a CVSS base score of 3.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-36084?
Check the references section above for vendor advisories and patch information. Affected products include: Selinux Project Selinux, Fedoraproject Fedora.