CVE-2025-68361 erofs: limit the level of fs stacking for file-backed mounts
A local attacker can cause a kernel stack overflow and system crash by exploiting excessive filesystem stacking in EROFS mounts.
- 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-2025-68361?
CVE-2025-68361 is a denial of service vulnerability in Linux, published on 24 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:
erofs: limit the level of fs stacking for file-backed mounts
Otherwise, it could cause potential kernel stack overflow (e.g., EROFS mounting itself).
Which versions are affected by CVE-2025-68361?
How do I fix CVE-2025-68361?
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-2025-68361 being exploited?
There is no known exploitation of CVE-2025-68361 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2025-68361, DEBIAN-CVE-2025-68361, GHSA-fgg5-fxhh-43x6, ROOT-OS-DEBIAN-13-CVE-2025-68361, UBUNTU-CVE-2025-68361.