Oracle has made available Java JRE 6 update 22. Among other things, this contains security fixes:
http://www.oracle.com/technetwork/ja...es-176121.html
If you want it now: it's not in the repo's (yet), but you can install it manually as well. For example by applying this updated how-to:
http://sites.google.com/site/easylinuxtipsproject/java
Good luck!
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