Bug 2396137 (CVE-2022-50364)

Summary: CVE-2022-50364 kernel: i2c: mux: reg: check return value after calling platform_get_resource()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-09-17 15:03:32 UTC 
In the Linux kernel, the following vulnerability has been resolved:

i2c: mux: reg: check return value after calling platform_get_resource()

It will cause null-ptr-deref in resource_size(), if platform_get_resource()
returns NULL, move calling resource_size() after devm_ioremap_resource() that
will check 'res' to avoid null-ptr-deref.
And use devm_platform_get_and_ioremap_resource() to simplify code.
Comment 1 Keith Grant 2025-09-17 17:47:03 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091715-CVE-2022-50364-b594@gregkh/T