# CVE-2025-40207: media: v4l2-subdev: Fix alloc failure check in v4l2\_subdev\_call\_state\_try()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-11-12 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 6.0

## Description

In the Linux kernel, the following vulnerability has been resolved: media: v4l2-subdev: Fix alloc failure check in v4l2_subdev_call_state_try() v4l2_subdev_call_state_try() macro allocates a subdev state with __v4l2_subdev_state_alloc(), but does not check the returned value. If __v4l2_subdev_state_alloc fails, it returns an ERR_PTR, and that would cause v4l2_subdev_call_state_try() to crash. Add proper error handling to v4l2_subdev_call_state_try().

## 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.
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## 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/5b0057459cdc243ffb35617603142dcace09c711
- https://git.kernel.org/stable/c/ed30811fbed40751deb952bde534aa2632dc0bf7
- https://git.kernel.org/stable/c/94e6336dc1f06a06f5b4cd04d4a012bba34f2857
- https://git.kernel.org/stable/c/a553530b3314a0bdc98cf114cdbe204551a70a00
- https://git.kernel.org/stable/c/f37df9a0eb5e43fcfe02cbaef076123dc0d79c7e

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Page: https://cve.now/CVE-2025-40207
JSON: https://cve.now/api/v1/entries/CVE-2025-40207
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