CVE-2022-50672 mailbox: zynq-ipi: fix error handling while device_register() fails
A null pointer dereference in the Zynq IPI mailbox driver can cause a kernel crash if device registration fails, leading to denial of service.
- 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-2022-50672?
CVE-2022-50672 is a vulnerability in Linux, published on 9 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:
mailbox: zynq-ipi: fix error handling while device_register() fails
If device_register() fails, it has two issues: 1. The name allocated by dev_set_name() is leaked. 2. The parent of device is not NULL, device_unregister() is called in zynqmp_ipi_free_mboxes(), it will lead a kernel crash because of removing not added device.
Call put_device() to give up the reference, so the name is freed in kobject_cleanup(). Add device registered check in zynqmp_ipi_free_mboxes() to avoid null-ptr-deref.
Which versions are affected by CVE-2022-50672?
How do I fix CVE-2022-50672?
Apply the vendor's patch.
Is CVE-2022-50672 being exploited?
There is no known exploitation of CVE-2022-50672 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2022-50672, GHSA-fc53-63px-vp2j, UBUNTU-CVE-2022-50672.