This update for libebml, libmatroska fixes the following security issues:

Vulnerabilities fixed in libebml:

* Cisco TALOS-CAN-0036: Invalid memory access when reading from a UTF-8 string resulted in a heap information leak (bsc#961031).
* Cisco TALOS-CAN-0037: Deeply nested elements with infinite size use-after-free and multiple free (bsc#961031).
* Invalid mempry access resulted in heap information leak

Vulnerabilities fixed in libmatroska:
* invalid memory access when reading specially crafted data lead to a heap information leak.