void vnc_sent_lossy_rect(VncState *vs, int x, int y, int w, int h)
{
    int i, j;

    w = (x + w) / VNC_STAT_RECT;
    h = (y + h) / VNC_STAT_RECT;
    x /= VNC_STAT_RECT;
    y /= VNC_STAT_RECT;

    for (j = y; j <= h; j++) {
        for (i = x; i <= w; i++) {
            vs->lossy_rect[j][i] = 1;
        }
    }
}

This category addresses vulnerabilities caused by flawed access control mechanisms, where incorrect permission settings allow unauthorized users to access restricted resources.