CVE-2026-31632 Linux内核rxgk内存泄露漏洞

/* * PoC for CVE-2026-31632 (Linux Kernel rxgk Memory Leak) * This code attempts to trigger the memory leak in rxgk_verify_response(). * Note: This is a conceptual demonstration. Triggering the specific kernel path * requires a configured rxrpc environment and specific key handling. * Compilation: gcc -o poc_cve2026_31632 poc_cve2026_31632.c */ #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <string.h> #include <sys/socket.h> // Simulating the trigger mechanism void trigger_vulnerability() { int sock; // In a real scenario, this would involve creating an AF_RXRPC socket // and manipulating rxgk keys to hit the rxgk_verify_response path. // sock = socket(AF_RXRPC, SOCK_SEQPACKET, AF_KAFS); // ... setup rxgk security context and send packets ... // Loop to simulate repeated calls to expose the leak for (int i = 0; i < 100; i++) { // System call or socket operation triggering the vulnerable function // This placeholder represents the interaction causing the leak usleep(10000); } } int main() { printf("[*] Starting PoC for CVE-2026-31632\n"); printf("[*] Attempting to leak kernel memory via rxgk_verify_response()...\n"); while (1) { trigger_vulnerability(); printf("[+] Iteration complete. Check kernel memory usage (e.g., slabtop / cat /proc/meminfo).\n"); sleep(1); } return 0; }