Bug 2406728 (CVE-2025-40030)

Summary: CVE-2025-40030 kernel: pinctrl: check the return value of pinmux_ops::get_function_name()
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 2025-10-28 12:02:13 UTC 
In the Linux kernel, the following vulnerability has been resolved:

pinctrl: check the return value of pinmux_ops::get_function_name()

While the API contract in docs doesn't specify it explicitly, the
generic implementation of the get_function_name() callback from struct
pinmux_ops - pinmux_generic_get_function_name() - can fail and return
NULL. This is already checked in pinmux_check_ops() so add a similar
check in pinmux_func_name_to_selector() instead of passing the returned
pointer right down to strcmp() where the NULL can get dereferenced. This
is normal operation when adding new pinfunctions.
Comment 1 Jon Moroney 2025-10-28 19:29:41 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025102810-CVE-2025-40030-b395@gregkh/T