CVE-2025-38134 Information

Jul 04, 2025 cve

Description

In the Linux kernel the following vulnerability has been resolved:

usb: acpi: Prevent null pointer dereference in usb_acpi_add_usb4_devlink()

As demonstrated by the fix for update_port_device_state commit 12783c0b9e2c (�sb: core: Prevent null pointer dereference in update_port_device_state) usb_hub_to_struct_hub() can return NULL in certain scenarios such as during hub driver unbind or teardown race conditions even if the underlying usb_device structure exists.

Plus all other places that call usb_hub_to_struct_hub() in the same file do check for NULL return values.

If usb_hub_to_struct_hub() returns NULL the subsequent access to hub->ports[udev->portnum - 1] will cause a null pointer dereference.

Reference

https://git.kernel.org/stable/c/73fb0ec9436ae87bcae067ce35d6cdd72bade86c https://git.kernel.org/stable/c/8fa544bff8466062e42949c93f3e528f4be5624b https://git.kernel.org/stable/c/e3d530173b70514d4390a94f9f979acad689b70a

CNNVD-202507-220 (Published: 2025-07-03)

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