CVE-2023-54305 ext4: refuse to create ea block when umounted
A local attacker can trigger a kernel panic in the ext4 filesystem by attempting to create an extended attribute block during unmount.
- 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-2023-54305?
CVE-2023-54305 is a vulnerability in Linux, published on 30 Dec 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:
ext4: refuse to create ea block when umounted
The ea block expansion need to access s_root while it is already set as NULL when umount is triggered. Refuse this request to avoid panic.
Which versions are affected by CVE-2023-54305?
How do I fix CVE-2023-54305?
Apply the vendor's patch.
Is CVE-2023-54305 being exploited?
There is no known exploitation of CVE-2023-54305 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2023-54305, DEBIAN-CVE-2023-54305, GHSA-xp6q-4ch5-xqhr, UBUNTU-CVE-2023-54305.