# Release X.Y (202?-??-??)

- Fix a FOD sandbox escape:
    Cooperating Nix derivations could send file descriptors to files in the Nix
    store to each other via Unix domain sockets in the abstract namespace. This
    allowed one derivation to modify the output of the other derivation, after Nix
    has registered the path as "valid" and immutable in the Nix database.
    In particular, this allowed the output of fixed-output derivations to be
    modified from their expected content. This isn't the case any more.
