The __block_prepare_write function in fs/buffer.c for Linux kernel 2.6.x before 2.6.13 does not properly clear buffers during certain error conditions, which allows local users to read portions of files that have been unlinked.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11701
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=207463
http://www.us.debian.org/security/2006/dsa-1233
http://www.ubuntu.com/usn/usn-395-1
http://www.securityfocus.com/bid/21522
http://www.novell.com/linux/security/advisories/2006_79_kernel.html
http://www.mandriva.com/security/advisories?name=MDKSA-2007:025
http://www.mandriva.com/security/advisories?name=MDKSA-2007:012
http://support.avaya.com/elmodocs2/security/ASA-2007-063.htm
http://secunia.com/advisories/24206
http://secunia.com/advisories/23997
http://secunia.com/advisories/23752
http://secunia.com/advisories/23474
http://secunia.com/advisories/23384
http://secunia.com/advisories/23370