CVE-2023-53807 clk: clocking-wizard: Fix Oops in clk_wzrd_register_divider()
A null pointer dereference in the Linux kernel clocking-wizard driver can cause a system crash, requiring a kernel patch.
- 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-2023-53807?
CVE-2023-53807 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:
clk: clocking-wizard: Fix Oops in clk_wzrd_register_divider()
Smatch detected this potential error pointer dereference clk_wzrd_register_divider(). If devm_clk_hw_register() fails then it sets "hw" to an error pointer and then dereferences it on the next line. Return the error directly instead.
Which versions are affected by CVE-2023-53807?
How do I fix CVE-2023-53807?
Apply the vendor's patch.
Is CVE-2023-53807 being exploited?
There is no known exploitation of CVE-2023-53807 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2023-53807, DEBIAN-CVE-2023-53807, GHSA-p889-q6fq-6rm4, UBUNTU-CVE-2023-53807.