That´s right.
They are prohibited under the Convention on Cluster Munitions (CCM) that prohibits the use, transfer and stockpile of CBUs.
108 countries has signed the CCM, it is a shame that China, Israel, The United States, India, Brazil and Pakistan aren´t part of it, basically for economics reasons.
It is dreadful to see this arms used against a civilian target, and a
cowardly behavior by those that order it.