Log Message:
mkvtoolnix: update to 28.2.0. security fix.

* mkvmerge, mkvinfo, mkvextract, mkvpropedit, MKVToolNix GUI's info tool &
  chapter editor: fixed a case of memory being accessed after it had been
  freed earlier. This can be triggered by specially crafted Matroska files and
  lead to arbitrary code execution. The vulnerability was reported as Cisco
  TALOS 2018-0694 on 2018-10-25.