CVE-2026-43022 Linux内核蓝牙资源泄露漏洞

/* * Conceptual PoC for CVE-2026-43022 * This demonstrates the logic of the vulnerability. Real exploitation * requires interacting with the Bluetooth HCI interface. */ #include <linux/module.h> #include <linux/bluetooth/hci_core.h> static int __init poc_init(void) { struct hci_dev *hdev; // Assume hdev is initialized properly // Simulate calling the vulnerable function multiple times // In the vulnerable version, return value handling might be missing int err = hci_cmd_sync_queue_once(hdev, NULL, NULL, NULL); if (err == -EEXIST) { // With the patch, this path is taken, preventing resource leak // Without patch, callers might ignore this or leak memory expecting a callback pr_info("Queue item already exists, handled correctly.\n"); } else { pr_info("Item queued or error occurred.\n"); } return 0; } static void __exit poc_exit(void) { pr_info("Exiting PoC.\n"); } module_init(poc_init); module_exit(poc_exit); MODULE_LICENSE("GPL");