What is the CVSS score of CVE-2021-36086?

CVE-2021-36086 has a CVSS 3.1 base score of 3.3 (Low). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L. EPSS exploitation probability: 0.0%.

Which versions of Debian Linux are affected by CVE-2021-36086?

CVE-2021-36086 is a low-severity vulnerability in CIL compiler in SELinux 3.2 (CVSS 3.3).. A patch is available.

Is there a public PoC exploit available for CVE-2021-36086?

Yes, a public proof-of-concept exploit is available for CVE-2021-36086. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2021-36086?

During next maintenance window: Apply vendor patches when convenient. Vendor patch is available.

Debian Linux CVE-2021-36086

LOW

Use After Free (CWE-416)

2021-07-01 cve@mitre.org

Memory Corruption Use After Free Information Disclosure Debian Linux Active Iq Unified Manager Bootstrap Os H610C Firmware H610S Firmware H615C Firmware Selinux Fedora Bootstrap

3.3

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

3.3 LOW

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 24, 2026 - 20:37 vuln.today

Patch released

Mar 24, 2026 - 20:37 nvd

Patch available

PoC Detected

Mar 24, 2026 - 20:25 vuln.today

Public exploit code

CVE Published

Jul 01, 2021 - 03:15 nvd

LOW 3.3

DescriptionCVE.org

The CIL compiler in SELinux 3.2 has a use-after-free in cil_reset_classpermission (called from cil_reset_classperms_set and cil_reset_classperms_list).

AnalysisAI

The CIL compiler in SELinux 3.2 has a use-after-free in cil_reset_classpermission (called from cil_reset_classperms_set and cil_reset_classperms_list). Rated low severity (CVSS 3.3), this vulnerability is 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_reset_classpermission (called from cil_reset_classperms_set and cil_reset_classperms_list). Affected products include: Debian Debian Linux, Netapp Active Iq Unified Manager, Netapp Bootstrap Os, Netapp H610C Firmware, Netapp H610S Firmware.

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.