The Debian initrd script for the cryptsetup package 2:1.7.3-2 and earlier allows physically proximate attackers to gain shell access via many log in attempts with an invalid password.
https://gitlab.com/cryptsetup/cryptsetup/commit/ef8a7d82d8d3716ae9b58179590f7908981fa0cb
http://www.securityfocus.com/bid/94315
http://www.openwall.com/lists/oss-security/2016/11/16/6
http://www.openwall.com/lists/oss-security/2016/11/15/4