CVE-2023-53573 clk: rs9: Fix suspend/resume
A null pointer dereference in the Linux kernel rs9 clock driver during resume causes a kernel panic, leading to denial of service.
- 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-2023-53573?
CVE-2023-53573 is a medium-severity vulnerability in Linux kernel, published on 4 Oct 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: rs9: Fix suspend/resume
Disabling the cache in commit 2ff4ba9e3702 ("clk: rs9: Fix I2C accessors") without removing cache synchronization in resume path results in a kernel panic as map->cache_ops is unset, due to REGCACHE_NONE. Enable flat cache again to support resume again. num_reg_defaults_raw is necessary to read the cache defaults from hardware. Some registers are strapped in hardware and cannot be provided in software.
Which versions are affected by CVE-2023-53573?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2023-53573?
Apply the vendor's patch.
Is CVE-2023-53573 being exploited?
There is no known exploitation of CVE-2023-53573 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2023-53573, DEBIAN-CVE-2023-53573, GHSA-23m6-25rj-w83p, UBUNTU-CVE-2023-53573.