CVE-2026-100072

Summary

In the Linux kernel, the following vulnerability has been resolved:

ACPI: platform: Use acpi_bus_get_primary_device()

The acpi_get_first_physical_node() usage in acpi_platform_fill_resource() and acpi_create_platform_device() is generally unsafe because in theory the device returned by it may be freed at any time [1].

It is also inefficient because acpi_get_first_physical_node() is called multiple times for the same argument which can be avoided.

Address these issues by using acpi_bus_get_primary_device() instead of acpi_get_first_physical_node() and adjusting the code to call it just once at the beginning of and acpi_create_platform_device() and drop the device reference acquired by it upon the return from that function.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/c9d202d3b6c28e8c779cd2f2b10d2f7ab665ca71
• https://git.kernel.org/stable/c/a9ba4dd2f18bf3f439d9ef0d8f375f90360ba1bd

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