CVE-2025-38134

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> usb: acpi: Prevent null pointer dereference in usb_acpi_add_usb4_devlink()<br /> <br /> As demonstrated by the fix for update_port_device_state,<br /> commit 12783c0b9e2c ("usb: core: Prevent null pointer dereference in update_port_device_state"),<br /> usb_hub_to_struct_hub() can return NULL in certain scenarios,<br /> such as during hub driver unbind or teardown race conditions,<br /> even if the underlying usb_device structure exists.<br /> <br /> Plus, all other places that call usb_hub_to_struct_hub() in the same file<br /> do check for NULL return values.<br /> <br /> If usb_hub_to_struct_hub() returns NULL, the subsequent access to<br /> hub-&gt;ports[udev-&gt;portnum - 1] will cause a null pointer dereference.