CVE-2022-49946 clk: bcm: rpi: Prevent out-of-bounds access
A missing sentinel in the Raspberry Pi clock driver allows out-of-bounds memory access, potentially causing crashes or code execution.
- 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-2022-49946?
CVE-2022-49946 is a high-severity memory corruption vulnerability in Linux kernel, published on 18 Jun 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: bcm: rpi: Prevent out-of-bounds access
The while loop in raspberrypi_discover_clocks() relies on the assumption that the id of the last clock element is zero. Because this data comes from the Videocore firmware and it doesn't guarantuee such a behavior this could lead to out-of-bounds access. So fix this by providing a sentinel element.
Weakness: CWE-125
Which versions are affected by CVE-2022-49946?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49946?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2022-49946 being exploited?
There is no known exploitation of CVE-2022-49946 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-49946, GHSA-j776-f4rc-fmmx, UBUNTU-CVE-2022-49946.