Is CVE-2021-36085 in the CISA KEV catalog?

No. CVE-2021-36085 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-36085?

CVE-2021-36085 has a CVSS v3 base score of 3.3 (LOW).

What is the EPSS score for CVE-2021-36085?

CVE-2021-36085 has an EPSS score of 0.45% (36th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-36085?

Upgrade libsepol on debian 11 to 3.1-1+deb11u1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2021-36085

LOW

3.3

CVSS v3

NVD

Description

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).

CWE-416Use After Free

How to fix

Remediation Available

libsepolDebian

Fixed in:3.1-1+deb11u1CVE-2021-36085

Fixed in:3.3-1CVE-2021-36085

libsepolUbuntu

Fixed in:2.4-2ubuntu0.1~esm1USN-5391-1

Fixed in:2.7-1ubuntu0.1USN-5391-1

Fixed in:3.0-1ubuntu0.1USN-5391-1

libsepol1Ubuntu

Fixed in:2.4-2ubuntu0.1~esm1USN-5391-1

Fixed in:2.7-1ubuntu0.1USN-5391-1

Fixed in:3.0-1ubuntu0.1USN-5391-1

sepol-utilsUbuntu

Fixed in:2.4-2ubuntu0.1~esm1USN-5391-1

Fixed in:2.7-1ubuntu0.1USN-5391-1

Fixed in:3.0-1ubuntu0.1USN-5391-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityLow

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

Exploit Intelligence

0.45%probability of exploitation in 30 days

36thpercentile

Low risk: more likely to be exploited than 36% of all known CVEs.

References

Patch2

Third-Party Advisory1

github.com

Other references3

Related Vulnerabilities

Other CWE-416 (Use After Free) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-0708	Critical	9.8	100%	KEV + Ransom	-
CVE-2021-31166	Critical	9.8	100%	KEV	Fix
CVE-2015-5119	Critical	9.8	99%	KEV	-
CVE-2010-3962	High	8.1	97%	KEV	-
CVE-2015-0313	Critical	9.8	96%	KEV	Fix
CVE-2017-9798	High	7.5	95%	-	Fix

Embed a live status badge for CVE-2021-36085

Markdown

[![CVE-2021-36085](https://tridentstack.com/cve/badge/CVE-2021-36085.svg)](https://tridentstack.com/cve/CVE-2021-36085)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-36085"><img src="https://tridentstack.com/cve/badge/CVE-2021-36085.svg" alt="CVE-2021-36085"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-03.