The XFS file system code in Linux 2.4.x has an information leak in which in-memory data is written to the device for the XFS file system, which allows local users to obtain sensitive information by reading the raw device.
http://marc.info/?l=bugtraq&m=108213675028441&w=2
http://secunia.com/advisories/11362
http://security.gentoo.org/glsa/glsa-200407-02.xml
https://exchange.xforce.ibmcloud.com/vulnerabilities/15901
http://www.mandriva.com/security/advisories?name=MDKSA-2004:029