CVE-2021-36085
LOWCVSS 3.3/10EPSS 0.45%
Last modified
CVE-2021-36085 is a low-severity vulnerability rated 3.3/10 on the CVSS scale. 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).. EPSS estimates a 0.45% chance of exploitation in the next 30 days.
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).
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Selinux Project | Selinux | 3.2 |
| Fedoraproject | Fedora | 35 |
References
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31124Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/SELinuxProject/selinux/commit/2d35fcc7e9e976a2346b1de20e54f8663e8a6cbaPatch, Third Party Advisory
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31124Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/SELinuxProject/selinux/commit/2d35fcc7e9e976a2346b1de20e54f8663e8a6cbaPatch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-36085?
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 a CVSS score of 3.3/10 (LOW severity). The EPSS model estimates a 0.45% probability of exploitation in the next 30 days.
How do I fix CVE-2021-36085?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-36085?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST