Linux kernel 2.4.10 through 2.4.21-pre4 does not properly handle the O_DIRECT feature, which allows local attackers with write privileges to read portions of previously deleted files, or cause file system corruption.
http://www.securityfocus.com/bid/6763
http://www.redhat.com/support/errata/RHSA-2003-025.html
http://www.mandrakesoft.com/security/advisories?name=MDKSA-2003:014
http://www.iss.net/security_center/static/11249.php
http://www.debian.org/security/2004/dsa-423
http://www.debian.org/security/2003/dsa-358
http://linux.bkbits.net:8080/linux-2.4/cset%403e2f193drGJDBg9SG6JwaDQwCBnAMQ