CVE-2025-71118

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ACPICA: Avoid walking the Namespace if start_node is NULL<br /> <br /> Although commit 0c9992315e73 ("ACPICA: Avoid walking the ACPI Namespace<br /> if it is not there") fixed the situation when both start_node and<br /> acpi_gbl_root_node are NULL, the Linux kernel mainline now still crashed<br /> on Honor Magicbook 14 Pro [1].<br /> <br /> That happens due to the access to the member of parent_node in<br /> acpi_ns_get_next_node(). The NULL pointer dereference will always<br /> happen, no matter whether or not the start_node is equal to<br /> ACPI_ROOT_OBJECT, so move the check of start_node being NULL<br /> out of the if block.<br /> <br /> Unfortunately, all the attempts to contact Honor have failed, they<br /> refused to provide any technical support for Linux.<br /> <br /> The bad DSDT table&amp;#39;s dump could be found on GitHub [2].<br /> <br /> DMI: HONOR FMB-P/FMB-P-PCB, BIOS 1.13 05/08/2025<br /> <br /> [ rjw: Subject adjustment, changelog edits ]