inline void Element::attributeChangedFromParserOrByCloning(const QualifiedName& name, const AtomicString& newValue, AttributeModificationReason reason)
{
    if (RuntimeEnabledFeatures::customDOMElementsEnabled() && name == isAttr) {
        document()->ensureCustomElementRegistry()->didGiveTypeExtension(this, newValue);
    }
    attributeChanged(name, newValue, reason);
}

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.