CVE-2025-37985 USB: wdm: close race between wdm_open and wdm_wwan_port_stop

In the Linux kernel, the following vulnerability has been resolved: USB: wdm: close race between wdmopen and wdmwwanportstop Clearing WDMWWANINUSE must be the last action or we can open a chardev whose URBs are still poisoned...

CVE-2025-37985

CVE-2025-37985 affects the Linux kernel USB wdm subsystem, specifically a race between wdm_open and wdm_wwan_port_stop. The issue arises if WDM_WWAN_IN_USE is not cleared last, allowing opening a chardev whose URBs may still be poisoned. Impact is local, with potential to exploit the race to caus...