The Airbus 320, flying from Rome to Moscow, was forced to land because of a problem with its nose landing gear and another, unspecified technical malfunction, airport spokesman Domokos Szollar said.
With no more flights to Moscow scheduled for Wednesday, the passengers were expected to spend the night in Budapest unless Aeroflot sends another plane for them, Szollar added.
The number of crew onboard was not immediately available.
Malaysia needs Russia's assistance in maintaining and repairing Su-30MKM fighter jets
Posters for the play "Adam and Eve. Life after Paradise" with pictures of dancers Arsen Aghamalyan and Oksana Vasilyeva were banned in the city of Tver, Central Russia