1.86.1. RHBA-2011:1053: libxml2 bug fix update
Updated libxml2 packages that fixes several bugs are now available for Red Hat Enterprise Linux 5.
The libxml2 library is a development toolbox providing the implementation of various XML standards. One of those standard is XML Schemas, which allow complex validation and checking of document conforming to a schemas describing the allowed structure and content of the document. Another one is XPath, which is a language for addressing parts of an XML document.
* Due to an uninitialized field in one of the private libxml2 XPath data structures, the XPath evaluation could have returned incorrect results. This error has been fixed, the field is now initialized properly, and XPath evaluation returns expected results. (BZ#613860
* Prior to this update, there were several problems present in the XML Schemas validation component of libxml2. As a result, validating a document against a schema could have been aborted and an error message similar to "xmllint: free(): invalid next size (fast)" could have been displayed under certain circumstances. With this update, the XML Schemas validation component has been fixed so that it works as expected. (BZ#644312
All users of libxml2 are advised to upgrade to these updated packages, which fix these bugs.