CVE-2023-52882 clk: sunxi-ng: h6: Reparent CPUX during PLL CPUX rate change
A race condition in the Linux kernel's Allwinner H6 clock driver can cause system instability and crashes during CPU frequency changes.
- 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-2023-52882?
CVE-2023-52882 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 30 May 2024. 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: sunxi-ng: h6: Reparent CPUX during PLL CPUX rate change
While PLL CPUX clock rate change when CPU is running from it works in vast majority of cases, now and then it causes instability. This leads to system crashes and other undefined behaviour. After a lot of testing (30+ hours) while also doing a lot of frequency switches, we can't observe any instability issues anymore when doing reparenting to stable clock like 24 MHz oscillator.
Which versions are affected by CVE-2023-52882?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2023-52882?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-52882 being exploited?
There is no known exploitation of CVE-2023-52882 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as BELL-CVE-2023-52882, DEBIAN-CVE-2023-52882, UBUNTU-CVE-2023-52882.