Bug 2414719 (CVE-2025-40207)

Summary: CVE-2025-40207 kernel: media: v4l2-subdev: Fix alloc failure check in v4l2_subdev_call_state_try()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2025-11-12 23:02:25 UTC 
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().
Comment 1 Alexander B 2025-11-13 11:39:47 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025111247-CVE-2025-40207-3528@gregkh/T