CVE-2023-53695 udf: Detect system inodes linked into directory hierarchy
A corrupted UDF filesystem can cause kernel confusion and crashes by linking system inodes into the directory hierarchy, requiring a kernel patch.
- 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-2023-53695?
CVE-2023-53695 is a high-severity denial of service vulnerability in Linux, published on 22 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:
udf: Detect system inodes linked into directory hierarchy
When UDF filesystem is corrupted, hidden system inodes can be linked into directory hierarchy which is an avenue for further serious corruption of the filesystem and kernel confusion as noticed by syzbot fuzzed images. Refuse to access system inodes linked into directory hierarchy and vice versa.
Which versions are affected by CVE-2023-53695?
How do I fix CVE-2023-53695?
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-2023-53695 being exploited?
There is no known exploitation of CVE-2023-53695 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2023-53695, DEBIAN-CVE-2023-53695, GHSA-8g62-7g79-h3h2, UBUNTU-CVE-2023-53695.