CVE-2026-64227

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ACPI: driver: Check ACPI_COMPANION() against NULL during probe<br /> <br /> Since every platform driver can be forced to match a device that doesn&amp;#39;t<br /> match its list of device IDs because of device_match_driver_override(),<br /> platform drivers that rely on the existence of a device&amp;#39;s ACPI companion<br /> object should verify its presence.<br /> <br /> Accordingly, add requisite ACPI_COMPANION() or ACPI_HANDLE() checks<br /> against NULL to 13 platform drivers handling core ACPI devices.<br /> <br /> Also change the value returned by the ACPI thermal zone driver when<br /> the device&amp;#39;s ACPI companion is not present to -ENODEV for consistency<br /> with the other drivers.