President Vladimir Putin said Russia had a “sufficient stockpile” of cluster bombs and reserved the right to use them if such munitions, the use of which he said he regarded as a crime, were deployed against Russian forces in Ukraine.
Ukraine said on Thursday it had received cluster bombs from the United States
From what I read the main purpose of cluster munitions is for offensive maneuvers, so my hope is Russia will be too busy (and unsuccessful) holding their frontlines to make effective use of them.