CVE-2025-39724

CVE-2025-39724 affects the Linux kernel serial 8250 driver. When PSLVERR_RESP_EN=1, an error response can be generated reading an empty RBR with FIFO enabled due to a race in serial8250_do_startup/DW paths. The fix wraps serial_port_out(port, UART_LCR, UART_LCR_WLEN8) under port->lock to preve...