No, not all Buldak ramen is halal certified.
While some Buldak products, specifically four flavors (original, cheese, Extra Hot Spicy, and carbonara), are certified halal by the Majlis Ulama Indonesia (MUI) in Indonesia, it does not mean that all Buldak products are halal globally. Whether a particular Buldak product is halal depends on its specific ingredients and the certification it has received from a recognized halal certification body. It is important to check for the halal certification symbol on the packaging to be certain.