CVE-2009-0819 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-0819): sql/item_xmlfunc.cc in MySQL before 5.1.32 allows remote authenticated users to cause a denial of service (crash) via "an XPath expression employing a scalar expression as a FilterExpr with ExtractValue() or UpdateXML()," which triggers an assertion failure.
Sorry, it's even hard-masked.
Fixed 5.1 ebuilds in the tree now.
Thanks.