static AttrNodeList* ensureAttrNodeListForElement(Element* element)
{
    if (element->hasSyntheticAttrChildNodes()) {
        ASSERT(attrNodeListMap().contains(element));
        return attrNodeListMap().get(element);
    }
    ASSERT(!attrNodeListMap().contains(element));
    element->setHasSyntheticAttrChildNodes(true);
    AttrNodeListMap::AddResult result = attrNodeListMap().add(element, adoptPtr(new AttrNodeList));
    return result.iterator->value.get();
}

This vulnerability category highlights issues in resource management where failures to properly release memory, file handles, or other resources can degrade system performance or enable denial-of-service conditions.