Bug 2418835 (CVE-2025-40224)

Summary: CVE-2025-40224 kernel: hwmon: (cgbc-hwmon) Add missing NULL check after devm_kzalloc()
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 2025-12-04 16:03:16 UTC 
In the Linux kernel, the following vulnerability has been resolved:

hwmon: (cgbc-hwmon) Add missing NULL check after devm_kzalloc()

The driver allocates memory for sensor data using devm_kzalloc(), but
did not check if the allocation succeeded. In case of memory allocation
failure, dereferencing the NULL pointer would lead to a kernel crash.

Add a NULL pointer check and return -ENOMEM to handle allocation failure
properly.
Comment 1 Alexander B 2025-12-05 15:19:15 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025120458-CVE-2025-40224-e7b1@gregkh/T