CVE-2025-68752 iavf: Implement settime64 with -EOPNOTSUPP
A missing function implementation in the iavf driver causes a NULL pointer dereference, allowing local attackers to crash the system.
- 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-2025-68752?
CVE-2025-68752 is a vulnerability in Linux, published on 5 Jan 2026. 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:
iavf: Implement settime64 with -EOPNOTSUPP
ptp_clock_settime() assumes every ptp_clock has implemented settime64(). Stub it with -EOPNOTSUPP to prevent a NULL dereference.
The fix is similar to commit 329d050bbe63 ("gve: Implement settime64 with -EOPNOTSUPP").
Which versions are affected by CVE-2025-68752?
How do I fix CVE-2025-68752?
Apply the vendor's patch.
Is CVE-2025-68752 being exploited?
There is no known exploitation of CVE-2025-68752 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2025-68752, DEBIAN-CVE-2025-68752, GHSA-cch3-p6q2-xfvj, UBUNTU-CVE-2025-68752.