The kernel in IBM AIX 5.2 and 5.3 does not properly handle resizing JFS2 filesystems on concurrent volume groups spread across multiple nodes, which allows local users of one node to cause a denial of service (remote node crash) by using chfs or lreducelv to reduce a filesystem's size.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5434
http://www14.software.ibm.com/webapp/set2/subscriptions/pqvcmjd?mode=18&ID=4155
http://www14.software.ibm.com/webapp/set2/subscriptions/pqvcmjd?mode=18&ID=4154
http://www14.software.ibm.com/webapp/set2/subscriptions/pqvcmjd?mode=18&ID=4153
http://www.vupen.com/english/advisories/2008/0865
http://www.securityfocus.com/bid/28467
http://www.ibm.com/support/docview.wss?uid=isg1IZ05246
http://www.ibm.com/support/docview.wss?uid=isg1IZ04953