Does a plea agreement waive a defendant's right to seek section 2255 or related relief?

A plea agreement is a contract and subject to contract law standards. United States v. Escamilla, 975 F.2d 568, 571 (9th Cir. 1992), United States v. Read, 778 F.2d 1437, 1441 (9th Cir. 1985). A defendant may waive the right to seek section 2255 and related relief. See United States v. Abarca, 985 F.2d 1012, 1013 (9th Cir. 1993), cert. denied, 508 U.S. 979 (1993). "[A] prisoner may not collaterally attack a judgment if the prisoner waived the right to do so." United States v. Racich, 35 F.Supp.2d 1206, 1210 (S.D. Cal. 1999). A plea agreement does not waive the right to seek section 2255 or related relief unless it does so expressly. United States v. Pruitt, 32 F.3d 431, 433 (9th Cir. 1994). The right to bring a collateral attack under section 2255 is statutory, and a "knowing and voluntary waiver of a statutory right is enforceable." Abarca, 985 F.2d at 1014.