CVE-2022-48946 udf: Fix preallocation discarding at indirect extent boundary
A memory corruption flaw in the Linux kernel's UDF filesystem allows attackers to corrupt extent tree headers, potentially leading to code execution or system crashes.
- 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-2022-48946?
CVE-2022-48946 is a medium-severity memory corruption vulnerability in Linux kernel, published on 21 Oct 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:
udf: Fix preallocation discarding at indirect extent boundary
When preallocation extent is the first one in the extent block, the code would corrupt extent tree header instead. Fix the problem and use udf_delete_aext() for deleting extent to avoid some code duplication.
Which versions are affected by CVE-2022-48946?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-48946?
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-2022-48946 being exploited?
There is no known exploitation of CVE-2022-48946 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-48946, GHSA-3fj9-rv52-g5r6, UBUNTU-CVE-2022-48946.