CVE-2021-36086

Name: CVE-2021-36086
Creator: NVD / NIST
Published: 2021-07-01T03:15:08.783+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 3.3/10EPSS 0.59%

Last modified Jun 17, 2026

CVE-2021-36086 is a low-severity vulnerability rated 3.3/10 on the CVSS scale. 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).. EPSS estimates a 0.59% chance of exploitation in the next 30 days.

Description

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).

Metrics

CVSS 3.1

3.3/10

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

EPSS Probability

0.59%

43.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Debian	Debian Linux	11.0
Netapp	Active Iq Unified Manager	All versions
Netapp	Bootstrap Os	All versions
Netapp	H610c Firmware	All versions
Netapp	H610s Firmware	All versions
Netapp	H615c Firmware	All versions
Selinux Project	Selinux	< 3.3
Fedoraproject	Fedora	35

References

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32177Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/SELinuxProject/selinux/commit/c49a8ea09501ad66e799ea41b8154b6770fec2c8Patch, Third Party Advisory
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-536.yamlThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U7ZYR3PIJ75N6U2IONJWCKZ5L2NKJTGR/Broken Link
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32177Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/SELinuxProject/selinux/commit/c49a8ea09501ad66e799ea41b8154b6770fec2c8Patch, Third Party Advisory
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-536.yamlThird Party Advisory
https://lists.debian.org/debian-lts-announce/2024/10/msg00021.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U7ZYR3PIJ75N6U2IONJWCKZ5L2NKJTGR/Broken Link
https://security.netapp.com/advisory/ntap-20250207-0004/Third Party Advisory

Timeline

Published: Jul 1, 2021
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2021-36086?

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).

How severe is CVE-2021-36086?

CVE-2021-36086 has a CVSS score of 3.3/10 (LOW severity). The EPSS model estimates a 0.59% probability of exploitation in the next 30 days.

How do I fix CVE-2021-36086?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-36086?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST