Bug 2414478 (CVE-2025-40156)

Summary: CVE-2025-40156 kernel: PM / devfreq: mtk-cci: Fix potential error pointer dereference in probe()
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 11:02:24 UTC 
In the Linux kernel, the following vulnerability has been resolved:

PM / devfreq: mtk-cci: Fix potential error pointer dereference in probe()

The drv->sram_reg pointer could be set to ERR_PTR(-EPROBE_DEFER) which
would lead to a error pointer dereference.  Use IS_ERR_OR_NULL() to check
that the pointer is valid.
Comment 1 Alexander B 2025-11-13 16:07:19 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025111258-CVE-2025-40156-3045@gregkh/T