static void virtio_notify_vector(VirtIODevice *vdev, uint16_t vector)
{
    BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
    VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);

    if (k->notify) {
        k->notify(qbus->parent, vector);
    }
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.