CVE-2025-68210 erofs: avoid infinite loop due to incomplete zstd-compressed data
A crafted EROFS image with truncated zstd data causes an infinite loop in the Linux kernel, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-68210?
CVE-2025-68210 is a denial of service vulnerability in Linux, published on 16 Dec 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
In the Linux kernel, the following vulnerability has been resolved:
erofs: avoid infinite loop due to incomplete zstd-compressed data
Currently, the decompression logic incorrectly spins if compressed data is truncated in crafted (deliberately corrupted) images.
Which versions are affected by CVE-2025-68210?
How do I fix CVE-2025-68210?
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-2025-68210 being exploited?
There is no known exploitation of CVE-2025-68210 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2025-68210, DEBIAN-CVE-2025-68210, GHSA-cgjv-9863-j668, ROOT-OS-DEBIAN-13-CVE-2025-68210, UBUNTU-CVE-2025-68210.