What is the CVSS score of CVE-2021-36084?

CVE-2021-36084 has a CVSS 3.1 base score of 3.3 (Low). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L. EPSS exploitation probability: 0.5%.

Is there a public PoC exploit available for CVE-2021-36084?

Yes, a public proof-of-concept exploit is available for CVE-2021-36084. Prioritise patching immediately. EPSS: 0.5%.

Is there a patch available for CVE-2021-36084?

Yes, a patch is available for CVE-2021-36084. Update the affected software to the latest version immediately.

Selinux CVE-2021-36084

LOW

Use After Free (CWE-416)

2021-07-01 cve@mitre.org

Use After Free Memory Corruption Information Disclosure Selinux Fedora

3.3

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

3.3 LOW

AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Lifecycle Timeline

CVE Published

Jul 01, 2021 - 03:15 nvd

LOW 3.3

DescriptionNVD

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).

AnalysisAI

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). Rated low severity (CVSS 3.3), this vulnerability is no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified as Use After Free (CWE-416), which allows attackers to access freed memory to execute arbitrary code or crash the application. 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). Affected products include: Selinux Project Selinux, Fedoraproject Fedora.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Use smart pointers or garbage-collected languages. Set pointers to NULL after freeing. Enable memory sanitizers.