DeliverToWindowOwner(DeviceIntPtr dev, WindowPtr win,
                     xEvent *events, int count, Mask filter, GrabPtr grab)
{
    /* if nobody ever wants to see this event, skip some work */
    if (filter != CantBeFiltered &&
        !((wOtherEventMasks(win) | win->eventMask) & filter))
        return EVENT_SKIP;

    if (IsInterferingGrab(wClient(win), dev, events))
        return EVENT_SKIP;

    if (!XaceHook(XACE_RECEIVE_ACCESS, wClient(win), win, events, count)) {
        int attempt = TryClientEvents(wClient(win), dev, events,
                                      count, win->eventMask,
                                      filter, grab);

        if (attempt > 0)
            return EVENT_DELIVERED;
        if (attempt < 0)
            return EVENT_REJECTED;
    }

    return EVENT_NOT_DELIVERED;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.