CVE-2025-38134

Summary

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 ("usb: 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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxf1bfb4a6fed64de1771b43a76631942279851744 < 8fa544bff8466062e42949c93f3e528f4be5624baffected
LinuxLinuxf1bfb4a6fed64de1771b43a76631942279851744 < e3d530173b70514d4390a94f9f979acad689b70aaffected
LinuxLinuxf1bfb4a6fed64de1771b43a76631942279851744 < 73fb0ec9436ae87bcae067ce35d6cdd72bade86caffected
LinuxLinux6.12affected
LinuxLinux0 < 6.12unaffected
LinuxLinux6.12.34 <= 6.12.*unaffected
LinuxLinux6.15.3 <= 6.15.*unaffected
LinuxLinux6.16 <= *unaffected

Weaknesses

References