Can a federal court set aside a sentence under section 2255 of the Criminal Code?

28 U.S.C. 2255 provides that a district court may set aside a sentence that was, inter alia, "not authorized by law or otherwise open to collateral attack, or that [denies or infringes the] constitutional rights of the prisoner so as to render the judgment subject to collateral attack." We have held that a district court may set aside a sentence under this section "for a constitutional error, a lack of jurisdiction in the sentencing court, or an error of law or fact that constitutes a fundamental defect which inherently results in a complete miscarriage of justice." United States v. Bokun, 73 F.3d 8, 12 (2d Cir.1995).