CVE-2022-50496 dm cache: Fix UAF in destroy()
A use-after-free vulnerability in the Linux kernel's dm cache module allows local attackers to potentially execute code or escalate privileges.
- 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-2022-50496?
CVE-2022-50496 is a high-severity use after free vulnerability in Linux kernel, published on 4 Oct 2025. 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 cache: Fix UAF in destroy()
Dm_cache also has the same UAF problem when dm_resume() and dm_destroy() are concurrent.
Therefore, cancelling timer again in destroy().
Weakness: CWE-416
Which versions are affected by CVE-2022-50496?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-50496?
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-2022-50496 being exploited?
There is no known exploitation of CVE-2022-50496 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-50496, GHSA-9rgw-cjpr-9389, UBUNTU-CVE-2022-50496.