Memory leak in the worker MPM (worker.c) for Apache 2, in certain circumstances, allows remote attackers to cause a denial of service (memory consumption) via aborted connections, which prevents the memory for the transaction pool from being reused for other connections.
https://www.ubuntu.com/usn/usn-225-1/
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10043
http://www.securityfocus.com/bid/15762
http://www.securityfocus.com/archive/1/425399/100/0/threaded
http://www.redhat.com/archives/fedora-announce-list/2006-January/msg00060.html