Two illumos security issues, https://www.illumos.org/issues/7488 and https://www.illumos.org/issues/7483 got CVE-2016-6560 and CVE-2016-6561.
First one is an issue in kernel bcopy code, second is related to in-kernel SMB server. Both can lead to system crash.
Both issues were fixed about ten days ago.
Check that your systems are updated at least to [email protected],5.11-2016.0.1.15933 .