Oracle Quarterly Security Updates - October 2009
Oracle highly recommends that DBAs and System Administrators apply these patches across a wide range of products promptly.
Oracle Critical Patch Update Advisory - October 2009
http://www.oracle.com/technology/deploy/security/critical-patch-updates/cpuoct2009.html
QUOTE: Due to the threat posed by a successful attack, Oracle strongly recommends that customers apply fixes as soon as possible. This Critical Patch Update contains 38 new security fixes across all products.