From owner-freebsd-current@freebsd.org  Wed Jun 28 14:27:16 2017
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Date: Wed, 28 Jun 2017 09:17:45 -0500 (CDT)
From: Dan Mack <mack@macktronics.com>
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To: freebsd-current@freebsd.org
Subject: fixes for stack clash vulnerability
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FreeBSD is mentioned as being vulnerable to this and Qualsys has working 
exploits which might be released soon:

   https://blog.qualys.com/securitylabs/2017/06/19/the-stack-clash

I don't remember seeing an advisory or seeing any fixes on the svn commit 
stream so just curious.

Dan