CVE-2021-47466 mm, slub: fix potential memoryleak in kmem_cache_open()
A memory leak in the Linux kernel's SLUB allocator error path can lead to resource exhaustion and 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-2021-47466?
CVE-2021-47466 is a medium-severity memory corruption vulnerability in Linux kernel, published on 22 May 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
mm, slub: fix potential memoryleak in kmem_cache_open()
In error path, the random_seq of slub cache might be leaked. Fix this by using __kmem_cache_release() to release all the relevant resources.
Weakness: CWE-401
Which versions are affected by CVE-2021-47466?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2021-47466?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-47466 being exploited?
There is no known exploitation of CVE-2021-47466 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2021-47466, GHSA-xwj2-c9hw-p6p6, UBUNTU-CVE-2021-47466.