[root@host pluginconf.d]# yum --security check-update
Geladene Plugins: security
Limiting package lists to security relevant ones
An update notice is broken, or duplicate, skipping: SLBA-2013:1751-1
An update notice is broken, or duplicate, skipping: SLBA-2014:1672-1
An update notice is broken, or duplicate, skipping: SLSA-2012:0997-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1009-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1046-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1054-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1064-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1068-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1081-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1088-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1089-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1091-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1098-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1102-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1116-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1123-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1131-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1132-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1135-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1139-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1141-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1151-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1156-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1180-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1202-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1206-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1208-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1210-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1211-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1221-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1223-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1234-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1255-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1256-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1259-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1261-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1263-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1265-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1268-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1269-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1283-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1288-01
An update notice is broken, or duplicate, skipping: SLSA-2012:1304-01
An update notice is broken, or duplicate, skipping: SLSA-2013:1752-1
An update notice is broken, or duplicate, skipping: SLSA-2013:1764-1
An update notice is broken, or duplicate, skipping: SLSA-2013:1778-1
An update notice is broken, or duplicate, skipping: SLSA-2013:1779-1
An update notice is broken, or duplicate, skipping: SLSA-2013:1801-1
An update notice is broken, or duplicate, skipping: SLSA-2013:1803-1
An update notice is broken, or duplicate, skipping: SLSA-2013:1805-1
An update notice is broken, or duplicate, skipping: SLSA-2013:1806-1
An update notice is broken, or duplicate, skipping: SLSA-2013:1812-1
An update notice is broken, or duplicate, skipping: SLSA-2013:1813-1
An update notice is broken, or duplicate, skipping: SLSA-2013:1823-1
An update notice is broken, or duplicate, skipping: SLSA-2013:1829-1
An update notice is broken, or duplicate, skipping: SLSA-2013:1850-1
An update notice is broken, or duplicate, skipping: SLSA-2014:1620-1
An update notice is broken, or duplicate, skipping: SLSA-2014:1634-1
An update notice is broken, or duplicate, skipping: SLSA-2014:1652-1
An update notice is broken, or duplicate, skipping: SLSA-2014:1655-1
An update notice is broken, or duplicate, skipping: SLSA-2014:1671-1
An update notice is broken, or duplicate, skipping: SLSA-2014:1676-1
No packages needed for security; 0 packages available
Security: kernel-2.6.32-504.30.3.el6.x86_64 is an installed security update
Security: kernel-2.6.32-504.23.4.el6.x86_64 is the currently running version