CVE-2025-68311 tty: serial: ip22zilog: Use platform device for probing
A null pointer dereference in the ip22zilog serial driver causes a kernel oops, leading to denial of service on affected Linux systems.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-68311?
CVE-2025-68311 is a vulnerability in Linux, published on 16 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:
tty: serial: ip22zilog: Use platform device for probing
After commit 84a9582fd203 ("serial: core: Start managing serial controllers to enable runtime PM") serial drivers need to provide a device in struct uart_port.dev otherwise an oops happens. To fix this issue for ip22zilog driver switch driver to a platform driver and setup the serial device in sgi-ip22 code.
Which versions are affected by CVE-2025-68311?
How do I fix CVE-2025-68311?
Apply the vendor's patch.
Is CVE-2025-68311 being exploited?
There is no known exploitation of CVE-2025-68311 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2025-68311, DEBIAN-CVE-2025-68311, GHSA-2373-8hcx-gwc5, ROOT-OS-DEBIAN-13-CVE-2025-68311, ROOT-OS-UBUNTU-2204-CVE-2025-68311, ROOT-OS-UBUNTU-2404-CVE-2025-68311 and 1 more.