CVE-2021-36085

low-risk
Published 2021-07-01

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).

Do I need to act?

-
0.02% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
3
CVSS 3.3/10 Low
LOCAL / LOW complexity

Affected Products (2)

Selinux

Affected Vendors

Fedoraproject Selinux Project

References (10)

Exploit https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31124
Patch https://github.com/SELinuxProject/selinux/commit/2d35fcc7e9e976a2346b1de20e54f86...
Third Party Advisory https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-421.ya...
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...
Exploit https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31124
Patch https://github.com/SELinuxProject/selinux/commit/2d35fcc7e9e976a2346b1de20e54f86...
Third Party Advisory https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-421.ya...
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/
20
/ 100
low-risk
Severity 13/34 · Low
Exploitability 0/34 · Minimal
Exposure 7/34 · Low