cmsBool ReadOneElem(cmsIOHANDLER* io,  _cmsDICelem* e, cmsUInt32Number i, cmsUInt32Number BaseOffset)
{
    if (!_cmsReadUInt32Number(io, &e->Offsets[i])) return FALSE;
    if (!_cmsReadUInt32Number(io, &e ->Sizes[i])) return FALSE;

    if (e ->Offsets[i] > 0)
        e ->Offsets[i] += BaseOffset;
    return TRUE;
}

The product reads data past the end, or before the beginning, of the intended buffer.