CVE-2013-5172
The kernel in Apple Mac OS X before 10.9 does not properly determine the output length for SHA-2 digest function calls, which allows context-dependent attackers to cause a denial of service (panic) by triggering a digest operation, as demonstrated by an IPSec connection.
Date published : 2013-10-23
http://lists.apple.com/archives/security-announce/2013/Oct/msg00004.html