Unknown vulnerability in Linux kernel 2.4.x, 2.5.x, and 2.6.x allows NFS clients to cause a denial of service via O_DIRECT.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11001
http://www.securityfocus.com/bid/12330
http://www.securityfocus.com/advisories/7880
http://www.redhat.com/support/errata/RHSA-2005-366.html
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000930