CVE-2026-31640 Linux内核rxrpc响应序列号比较错误漏洞

/* * PoC Concept for CVE-2026-31640 * Triggering the rxrpc logic error requires interacting with a target * that uses the rxrpc protocol (e.g., AFS or kafs). * * This is a simulation of the network interaction. */ #include <stdio.h> #include <stdlib.h> #include <string.h> int main() { printf("[+] CVE-2026-31640 PoC Simulation\n"); printf("[+] Target: Linux Kernel with vulnerable rxrpc module\n"); printf("[+] Action: Sending crafted rxrpc response packets...\n"); // In a real exploit, an attacker would send specific rxrpc packets // with manipulated challenge serial numbers to trigger the // wrong skb comparison in rxrpc_post_response(). // // Pseudocode for packet injection: // 1. Establish rxrpc connection. // 2. Send initial challenge. // 3. Send response with serial number that should trigger update logic. // 4. Observe kernel panic or instability. printf("[!] Exploit logic depends on specific kernel configuration.\n"); return 0; }