CVE-2025-38648 spi: stm32: Check for cfg availability in stm32_spi_probe
A missing null check in the STM32 SPI driver probe function can cause a kernel crash, 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-2025-38648?
CVE-2025-38648 is a medium-severity vulnerability in Linux kernel, published on 22 Aug 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: stm32: Check for cfg availability in stm32_spi_probe
The stm32_spi_probe function now includes a check to ensure that the pointer returned by of_device_get_match_data is not NULL before accessing its members. This resolves a warning where a potential NULL pointer dereference could occur when accessing cfg->has_device_mode.
Before accessing the 'has_device_mode' member, we verify that 'cfg' is not NULL. If 'cfg' is NULL, an error message is logged.
This change ensures that the driver does not attempt to access configuration data if it is not available, thus preventing a potential system crash due to a NULL pointer dereference.
Weakness: CWE-476
Which versions are affected by CVE-2025-38648?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-38648?
Apply the vendor's patch.
Is CVE-2025-38648 being exploited?
There is no known exploitation of CVE-2025-38648 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-66623, BELL-CVE-2025-38648, DEBIAN-CVE-2025-38648, GHSA-59c7-fqjc-f8fc, ROOT-OS-DEBIAN-13-CVE-2025-38648, ROOT-OS-UBUNTU-2404-CVE-2025-38648 and 1 more.