Home/CVE/The CIL compiler in SELinux 3.2 has a use-after-free in __cil_verify_classperms (called from __cil_verify_classpermissio
CVE

CVE-2021-36084

The CIL compiler in SELinux 3.2 has a use-after-free in __cil_verify_classperms (called from __cil_verify_classpermissio

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).

LOW · CVSS 3.3 EPSS 0.00024
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-416Use After Free
▤

Affected Products & Versions

2
selinux project selinuxall versions
fedoraproject fedoraall versions
⚠

Public Exploits & PoCs

1
pocbugs.chromium.org · detail?id=31065bugs.chromium.org
▣

Scoring & Timeline

3.3
LOW · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD01 Jul 2021 · 03:15 AM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
⚑

Vendor Advisories

6
siemens-csafSSA-202008
siemens-csafSSA-398330
usnUSN-5391-1
rhsaRHSA-2021:4513Moderate
oracle-cpuoracle-cpu-Oracle-Communications-Cloud-Native-Core-Policy-14277--CVE-2021-36084
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/SELinuxProject/selinux/commit/f34d3d30c8325e4847a6b696fe7a3936a8a361f3PatchThird Party Advisory
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-417.yamlThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U7ZYR3PIJ75N6U2IONJWCKZ5L2NKJTGR/
https://lists.debian.org/debian-lts-announce/2024/10/msg00021.html
https://security.netapp.com/advisory/ntap-20250207-0004/
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