The 802.11 network stack in net80211/ieee80211_input.c in MadWifi before 0.9.3.1 allows remote attackers to cause a denial of service (system hang) via a crafted length field in nested 802.3 Ethernet frames in Fast Frame packets, which results in a NULL pointer dereference.
https://exchange.xforce.ibmcloud.com/vulnerabilities/34455
http://www.vupen.com/english/advisories/2007/1919
http://www.ubuntu.com/usn/usn-479-1
http://www.securityfocus.com/bid/24114
http://www.securityfocus.com/archive/1/470674/100/100/threaded
http://www.novell.com/linux/security/advisories/2007_14_sr.html
http://www.mandriva.com/security/advisories?name=MDKSA-2007:132
http://security.gentoo.org/glsa/glsa-200706-04.xml
http://secunia.com/advisories/26083
http://secunia.com/advisories/25861
http://secunia.com/advisories/25763
http://secunia.com/advisories/25622
http://secunia.com/advisories/25339