Linux kernel versions from 2.6.26 to 3.3 (inclusive) are vulnerable to a deadlock condition in the handling of leap second adjustments provided provided through NTP. The next leap second adjustment is going to occur on June 30th, 2015, and there is potential for this to cause Linux-based Extreme Networks products to crash/hang.
Hi - Thanks for the question!
I just wanted to let you know that we're looking into this and I'll get back to you as soon as there is more information to share.