CVE-2024-50091 dm vdo: don't refer to dedupe_context after releasing it
A use-after-free vulnerability in the Linux kernel's dm vdo module allows attackers to potentially execute code or cause a system crash.
- 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-2024-50091?
CVE-2024-50091 is a high-severity use after free vulnerability in Linux kernel, published on 5 Nov 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:
dm vdo: don't refer to dedupe_context after releasing it
Clear the dedupe_context pointer in a data_vio whenever ownership of the context is lost, so that vdo can't examine it accidentally.
Which versions are affected by CVE-2024-50091?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-50091?
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-2024-50091 being exploited?
There is no known exploitation of CVE-2024-50091 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-52616, AZL-52749, BELL-CVE-2024-50091, DEBIAN-CVE-2024-50091, GHSA-jxxc-79rj-gvh4, ROOT-OS-UBUNTU-2204-CVE-2024-50091 and 2 more.