An unspecified vulnerability in the GIS extension subcomponent of the MySQL protocol component of the Oracle MySQL server allows remote authenticated attackers to alter availability via unspecified vectors. References: [1] http://www.oracle.com/technetwork/topics/security/cpujan2013-1515902.html
According to Oracle CPU data, this issue affected "5.1.65 and earlier, 5.5.27 and earlier", hence it should be fixed in 5.1.66. MySQL packages in Red Hat Enterprise Linux 6 were updated to 5.1.66 via RHSA-2012:1462: https://rhn.redhat.com/errata/RHSA-2012-1462.html