CVE-2025-68343

In the Linux kernel, the following vulnerability has been resolved:

can: gs_usb: gs_usb_receive_bulk_callback(): check actual_length before accessing header

The driver expects to receive a struct gs_host_frame in gs_usb_receive_bulk_callback().

Use struct_group to describe the header of the struct gs_host_frame and check that we have at least received the header before accessing any members of it.

To resubmit the URB, do not dereference the pointer chain "dev->parent->hf_size_rx" but use "parent->hf_size_rx" instead. Since "urb->context" contains "parent", it is always defined, while "dev" is not defined if the URB it too short.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.