CVE-2026-31617 usb: gadget: f_ncm: validate minimum block_len in ncm_unwrap_ntb()

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: fncm: validate minimum blocklen in ncmunwrapntb The blocklen read from the host-supplied NTB header is checked against ntbmax but has no lower bound. When blocklen is smaller than opts-ndpsize, the bounds check of:...