The Conservative former prime minister said Mr Johnson privately claimed there could be a "fresh renegotiation, followed by a second referendum" - which he now says he opposes.
In extracts of his long-awaited memoir serialised in the Sunday Times, Mr Cameron also labelled Brexiteer Michael Gove, who was once a close friend, a "foam-flecked Faragist".
Are David Cameron's comments on Boris, fair? | The Nigel Farage Show podcast - Listen or read transcript on Metacast
