CVE-2024-42306 udf: Avoid using corrupted block bitmap buffer
A corrupted UDF block bitmap can cause inconsistent allocation states, potentially leading to system instability or 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-2024-42306?
CVE-2024-42306 is a high-severity denial of service vulnerability in Linux kernel, published on 17 Aug 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: Avoid using corrupted block bitmap buffer
When the filesystem block bitmap is corrupted, we detect the corruption while loading the bitmap and fail the allocation with error. However the next allocation from the same bitmap will notice the bitmap buffer is already loaded and tries to allocate from the bitmap with mixed results (depending on the exact nature of the bitmap corruption). Fix the problem by using BH_verified bit to indicate whether the bitmap is valid or not.
Which versions are affected by CVE-2024-42306?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-42306?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2024-42306 being exploited?
There is no known exploitation of CVE-2024-42306 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-42306, DEBIAN-CVE-2024-42306, GHSA-782r-hcgf-6crv, UBUNTU-CVE-2024-42306.