CVE-2025-71092: Linux内核RDMA/bnxt_re驱动越界写入漏洞

# CVE-2025-71092 PoC - Linux Kernel RDMA/bnxt_re OOB Write # This PoC demonstrates triggering the OOB write in bnxt_re_copy_err_stats() # Note: Requires bnxt_re hardware and specific kernel version import os import sys def check_vulnerability(): """Check if system is vulnerable to CVE-2025-71092""" print("[*] Checking vulnerability status for CVE-2025-71092") print("[*] Target: Linux kernel RDMA/bnxt_re driver") # Check kernel version kernel_version = os.popen("uname -r").read().strip() print(f"[*] Current kernel version: {kernel_version}") # Check if bnxt_re module is loaded result = os.popen("lsmod | grep bnxt_re").read() if result: print(f"[+] bnxt_re module is loaded: {result.strip()}") else: print("[-] bnxt_re module is not loaded") print("[*] Vulnerability requires bnxt_re hardware to be present") return False # Check for Mellanox/Broadcom network adapters lspci_result = os.popen("lspci | grep -iE 'ethernet|network' | grep -iE 'broadcom|mellanox'").read() if lspci_result: print(f"[+] Found compatible hardware: {lspci_result.strip()}") print("[*] For full exploitation, kernel debugging and hardware access required") print("[*] Recommended action: Update to patched kernel version") return None def trigger_vulnerability(): """ Attempt to trigger the OOB write condition This requires specific RDMA operations on vulnerable hardware """ print("[*] Attempting to trigger vulnerability...") print("[!] Warning: This may cause system instability or crash") print("[*] Trigger method: Execute RDMA operations that access error counters") print("[*] Expected result: Kernel oops/panic due to OOB write in hw_stats") # The actual trigger would involve: # 1. Loading the bnxt_re module on vulnerable hardware # 2. Initializing RDMA resources # 3. Triggering error conditions that populate the counters # 4. The bnxt_re_copy_err_stats() function writes beyond allocated buffer return False if __name__ == "__main__": print("=" * 60) print("CVE-2025-71092 PoC - Linux Kernel bnxt_re OOB Write") print("=" * 60) check_vulnerability() print("\n[*] For detailed exploitation, refer to kernel source analysis") print("[*] Key functions: bnxt_re_copy_err_stats(), BNXT_RE_NUM_STD_COUNTERS") print("[*] Vulnerable commits: ef56081d1864")