The England duo's contracts expire in the summer and Benitez appeared to suggest that the west London outfit would not offer them new deals in a recent press conference.
However, the Spaniard has described the confusion as a "misunderstanding", though he did admit uncertainty over whether the pair will stay.
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"Past that, I do not know. I know that Frank is happy here and he is a player that is part of the leadership, he is one of the important players, but I do not know about his future.
"So I cannot say yes or no, he will stay or he will leave, in January or even at the end of the season. At this moment, I do not know."
Benitez also refuted claims that his meeting with the club board on Friday had concerned anyone leaving Stamford Bridge.
"We didn't talk about any players going," he continued. "The board were asking me about players coming but not about any players leaving."