MySQL was updated to 5.6.27 to fix security issues and bugs.

The following vulnerabilities were fixed as part of the upstream release [boo#951391]:
CVE-2015-1793, CVE-2015-0286, CVE-2015-0288, CVE-2015-1789,
CVE-2015-4730, CVE-2015-4766, CVE-2015-4792, CVE-2015-4800,
CVE-2015-4802, CVE-2015-4815, CVE-2015-4816, CVE-2015-4819,
CVE-2015-4826, CVE-2015-4830, CVE-2015-4833, CVE-2015-4836,
CVE-2015-4858, CVE-2015-4861, CVE-2015-4862, CVE-2015-4864,
CVE-2015-4866, CVE-2015-4870, CVE-2015-4879, CVE-2015-4890,
CVE-2015-4895, CVE-2015-4904, CVE-2015-4905, CVE-2015-4910,
CVE-2015-4913

Details on these and other changes can be found at:
http://dev.mysql.com/doc/relnotes/mysql/5.6/en/news-5-6-27.html

The following security relevant changes are included additionally:

* CVE-2015-3152: MySQL lacked SSL enforcement.
Using --ssl-verify-server-cert and --ssl[-*] implies that the ssl
connection is required. The mysql client will now print an error if
ssl is required, but the server can not handle a ssl connection
[boo#924663], [boo#928962]