The updated version contains several bug fixes when compared to the previous Intel® Threading Building Blocks (Intel® TBB) 2017 Update 4 release. Information about new features of previous release you can find under the following link.
Added functionality:
Changes affecting backward compatibility:
Bugs fixed:
Intel TBB 2017 U5 is available as a part of Intel(R) Parallel Studio XE 2018 Beta and is installed with Parallel STL, an implementation of the C++ standard library algorithms with support for execution policies. For more information about Parallel STL, see Getting Started and Release Notes.
For more such intel resources and tools from Intel on Game, please visit the Intel® Game Developer Zone
Source:https://software.intel.com/en-us/articles/whats-new-intel-threading-building-blocks-2017-update-5