CVE-2021-36084 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
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-36084?
CVE-2021-36084 is a low-severity use after free vulnerability in Fedoraproject Fedora, published on 1 Jul 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
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).
Weakness: CWE-416
Which versions are affected by CVE-2021-36084?
It affects 2 products.
Products include Fedoraproject Fedora, Selinux Project Selinux.
How do I fix CVE-2021-36084?
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-2021-36084 being exploited?
There is no known exploitation of CVE-2021-36084 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as DEBIAN-CVE-2021-36084, GHSA-8p9r-xrm6-68wq, UBUNTU-CVE-2021-36084.