CVE-2022-49173 spi: fsi: Implement a timeout for polling status
A missing timeout in the Linux kernel SPI FSI driver allows hardware errors to cause infinite polling loops, leading to system hangs.
- 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-2022-49173?
CVE-2022-49173 is a medium-severity denial of service vulnerability in Linux kernel, published on 26 Feb 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:
spi: fsi: Implement a timeout for polling status
The data transfer routines must poll the status register to determine when more data can be shifted in or out. If the hardware gets into a bad state, these polling loops may never exit. Prevent this by returning an error if a timeout is exceeded.
Which versions are affected by CVE-2022-49173?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49173?
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-2022-49173 being exploited?
There is no known exploitation of CVE-2022-49173 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-49173, GHSA-p9hw-fm35-gg6p, ROOT-OS-DEBIAN-11-CVE-2022-49173, ROOT-OS-UBUNTU-2204-CVE-2022-49173, UBUNTU-CVE-2022-49173.