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CVE-2021-36085

Date: June 30, 2021

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).

Language: C

Severity Score

3.3

Related Resources (10)

Url: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31124

Url: https://access.redhat.com/security/cve/CVE-2021-36085

Url: https://github.com/SELinuxProject/selinux/commit/2d35fcc7e9e976a2346b1de20e54f8663e8a6cba

Url: https://people.canonical.com/~ubuntu-security/cve/CVE-2021-36085

Url: https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-421.yaml

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U7ZYR3PIJ75N6U2IONJWCKZ5L2NKJTGR/

Url: https://security-tracker.debian.org/tracker/CVE-2021-36085

Url: https://nvd.nist.gov/vuln/detail/CVE-2021-36085

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U7ZYR3PIJ75N6U2IONJWCKZ5L2NKJTGR/

Url: https://www.mend.io/vulnerability-database/CVE-2021-36085

Severity Score

3.3

Weakness Type (CWE)

Use After Free

CWE-416

CVSS v3.1

Base Score:	3.3
Attack Vector (AV):	LOCAL
Attack Complexity (AC):	LOW
Privileges Required (PR):	LOW
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	LOW

CVSS v2

Base Score:	2.1
Access Vector (AV):	LOCAL
Access Complexity (AC):	LOW
Authentication (AU):	NONE
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	PARTIAL
Additional information:

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