CVE-2021-36086 Use after free in n/a
A use-after-free in the SELinux CIL compiler allows attackers to potentially execute arbitrary code or cause a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-36086?
CVE-2021-36086 is a low-severity use after free vulnerability in Debian Debian Linux, published on 1 Jul 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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).
Weakness: CWE-416
Which versions are affected by CVE-2021-36086?
It affects 8 products.
Products include Debian Debian Linux, Fedoraproject Fedora, Netapp Active Iq Unified Manager, Netapp Bootstrap Os, Netapp H610c Firmware, Netapp H610s Firmware and 2 more.
How do I fix CVE-2021-36086?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2021-36086 being exploited?
There is no known exploitation of CVE-2021-36086 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2021-36086, GHSA-7qg9-9x35-j2qf, OESA-2022-1753, UBUNTU-CVE-2021-36086.