CVE-2025-21830 landlock: Handle weird files
A flaw in the Linux kernel Landlock security module allows access to corrupted filesystem files, potentially bypassing security restrictions.
- 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-2025-21830?
CVE-2025-21830 is a high-severity vulnerability in Linux kernel, published on 6 Mar 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:
landlock: Handle weird files
A corrupted filesystem (e.g. bcachefs) might return weird files. Instead of throwing a warning and allowing access to such file, treat them as regular files.
Which versions are affected by CVE-2025-21830?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-21830?
Apply the vendor's patch.
Is CVE-2025-21830 being exploited?
There is no known exploitation of CVE-2025-21830 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2025-21830, DEBIAN-CVE-2025-21830, GHSA-fh4m-wrmp-8q2f, ROOT-OS-UBUNTU-2404-CVE-2025-21830, UBUNTU-CVE-2025-21830.