Bug 2418833 (CVE-2025-40226)

Summary: CVE-2025-40226 kernel: firmware: arm_scmi: Account for failed debug initialization
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-12-04 16:03:12 UTC 
In the Linux kernel, the following vulnerability has been resolved:

firmware: arm_scmi: Account for failed debug initialization

When the SCMI debug subsystem fails to initialize, the related debug root
will be missing, and the underlying descriptor will be NULL.

Handle this fault condition in the SCMI debug helpers that maintain
metrics counters.
Comment 1 Alexander B 2025-12-05 15:24:01 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025120458-CVE-2025-40226-4909@gregkh/T