Buffer overflow in the ixj telephony card driver in Linux before 2.4.20 has unknown impact and attack vectors.
https://exchange.xforce.ibmcloud.com/vulnerabilities/10417
http://www.securityfocus.com/bid/5985
http://www.redhat.com/support/errata/RHSA-2004-106.html
http://www.redhat.com/support/errata/RHSA-2004-044.html
http://www.redhat.com/support/errata/RHSA-2002-206.html