MySQL 5.6 Release Notes
A known limitation of this release:
If you have InnoDB tables with full-text
search indexes and you are upgrading from MySQL 5.6.10 to a
MySQL version up to and including MySQL 5.6.18, the server
will fail to start after the upgrade (Bug#72079). This bug is
fixed in MySQL 5.6.19. As a workaround, remove full-text
search indexes prior to upgrading and rebuild full-text search
indexes after the upgrade is completed.
The MySQL 5.6 Commercial Server has been updated to use OpenSSL version 1.0.1g, which has been publicly reported as not vulnerable to CVE-2014-0160. Please see Oracle Note #1645479.1 for further details.
The MySQL 5.6 Community Server is built using the yaSSL
cryptographic software library instead of OpenSSL.
Oracle-produced MySQL 5.6 Community Server binaries use
YaSSL libraries which have been reported as
not affected by CVE-2014-0160. Users of MySQL Server binaries
produced by parties other than Oracle should seek a
vulnerability assessment from their respective binary providers.
Since the only change in MySQL Server 5.6.18 is the inclusion of OpenSSL libraries publicly reported as unaffected by CVE-2014-0160, and since Oracle-produced MySQL Community builds do not include OpenSSL libraries known to be affected by CVE-2014-0160, Oracle is not producing builds for MySQL Community Server for version 5.6.18. This means that MySQL Community Server is skipping version 5.6.18. (Bug #18533200)