The find_target function in ptrace32.c in the Linux kernel 2.4.x before 2.4.29 does not properly handle a NULL return value from another function, which allows local users to cause a denial of service (kernel crash/oops) by running a 32-bit ltrace program with the -i option on a 64-bit executable program.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9647
http://wwwnew.mandriva.com/security/advisories?name=MDKSA-2006:044
http://www.vupen.com/english/advisories/2005/1878
http://www.securityfocus.com/bid/14965
http://www.securityfocus.com/archive/1/428058/100/0/threaded
http://www.redhat.com/support/errata/RHSA-2005-663.html
http://www.debian.org/security/2005/dsa-921
http://secunia.com/advisories/19038
http://secunia.com/advisories/18977
http://secunia.com/advisories/18059
http://secunia.com/advisories/17002
http://lists.suse.de/archive/suse-security-announce/2006-Feb/0010.html
http://linux.bkbits.net:8080/linux-2.4/cset%4041dd3455GwQPufrGvBJjcUOXQa3WXA