In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_uac1_legacy: validate control request size f_audio_complete() copies req-length bytes into a 4-byte stack variable: u32 data = 0; memcpy(&data, req-buf, req-length); req-length is derived from the host-controlled USB request path, which can lead to a stack out-of-bounds write. Validate req-actual against the expected payload size for the supported control selectors and decode only the expected amount of data. This avoids copying a host-influenced length into a fixed-size stack object.