Certain modifications to the Linux kernel 2.6.16 and earlier do not add the appropriate Linux Security Modules (LSM) file_permission hooks to the (1) readv and (2) writev functions, which might allow attackers to bypass intended access restrictions.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9927
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=191524
http://www.ussg.iu.edu/hypermail/linux/kernel/0604.3/0777.html
http://www.ubuntu.com/usn/usn-302-1
http://www.securityfocus.com/bid/18105
http://www.redhat.com/support/errata/RHSA-2006-0493.html
http://www.mandriva.com/security/advisories?name=MDKSA-2006:123
http://www.debian.org/security/2006/dsa-1184
http://support.avaya.com/elmodocs2/security/ASA-2006-161.htm
http://secunia.com/advisories/22093
http://secunia.com/advisories/21745
http://secunia.com/advisories/21045
http://secunia.com/advisories/20716
http://secunia.com/advisories/20237
http://lists.jammed.com/linux-security-module/2005/09/0019.html