Das U-Boot 2016.11-rc1 through 2019.04 mishandles the ext4 64-bit extension, resulting in a buffer overflow.
genranduuid in lib/uuid.c in Das U-Boot v2014.04 through v2019.04 lacks an srand call, which allows attackers to determine UUID values in scenarios where CONFIGRANDOMUUID is enabled, and Das U-Boot is relied upon for UUID values of a GUID Partition Table of a boot device.