CVE-2025-40314

/// Technical description

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

usb: cdns3: gadget: Use-after-free during failed initialization and exit of cdnsp gadget

In the __cdnsp_gadget_init() and cdnsp_gadget_exit() functions, the gadget

structure (pdev->gadget) was freed before its endpoints.

The endpoints are linked via the ep_list in the gadget structure.

Freeing the gadget first leaves dangling pointers in the endpoint list.

When the endpoints are subsequently freed, this results in a use-after-free.

Fix:

By separating the usb_del_gadget_udc() operation into distinct "del" and

"put" steps, cdnsp_gadget_free_endpoints() can be executed prior to the

final release of the gadget structure with usb_put_gadget().

A patch similar to bb9c74a5bd14("usb: dwc3: gadget: Free gadget structure

only after freeing endpoints").

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References