Vulnerability Description
The CIL compiler in SELinux 3.2 has a use-after-free in __cil_verify_classperms (called from __verify_map_perm_classperms and hashtab_map).
CVSS Score
3.3
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/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=31124ExploitIssue TrackingPatch
- https://github.com/SELinuxProject/selinux/commit/2d35fcc7e9e976a2346b1de20e54f86PatchThird Party Advisory
- https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-421.yaThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31124ExploitIssue TrackingPatch
- https://github.com/SELinuxProject/selinux/commit/2d35fcc7e9e976a2346b1de20e54f86PatchThird Party Advisory
- https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-421.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-2021-36085?
CVE-2021-36085 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 __verify_map_perm_classperms and hashtab_map).
How severe is CVE-2021-36085?
CVE-2021-36085 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-2021-36085?
Check the references section above for vendor advisories and patch information. Affected products include: Selinux Project Selinux, Fedoraproject Fedora.