Linux kernel 2.x.6 before 2.6.17.9 and 2.4.x before 2.4.33.1 on PowerPC PPC970 systems allows local users to cause a denial of service (crash) related to the "HID0 attention enable on PPC970 at boot time."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10666
http://www.vupen.com/english/advisories/2006/3331
http://www.vupen.com/english/advisories/2006/3330
http://www.ubuntu.com/usn/usn-346-1
http://www.securityfocus.com/bid/19615
http://www.redhat.com/support/errata/RHSA-2006-0689.html
http://www.debian.org/security/2006/dsa-1237
http://www.debian.org/security/2006/dsa-1184
http://support.avaya.com/elmodocs2/security/ASA-2006-249.htm
http://secunia.com/advisories/22945
http://secunia.com/advisories/22292
http://secunia.com/advisories/22148
http://secunia.com/advisories/22093
http://secunia.com/advisories/21934
http://secunia.com/advisories/21847