May a criminal defendant attack the validity of his guilty plea when a post conviction clarification in law reveals that he was misinformed regarding the statutory penalty attached to his charged offense?

May this Court's decision in Bousley v United States, 523 U.S. 614 (1998), which created an exception to this Court's earlier holding in Brady v United States, 397 U.S. 742 (1970), be extended to include challenges to the validity of a guilty plea when a post conviction clarification in law reveals that the defendant is actually innocent of a mandatory sentencing enhancement and is misinformed of the relevant circumstances surrounding the plea and the direct consquences of the plea?

Does this Court's holding in Brady forclose a defendant's challenge that his plea agreement is voidable under contract law principles?

May a criminal defendant attack the validity of his guilty plea when a post conviction clarification in law reveals that he was misinformed regarding the statutory penalty attached to his charged offense?