The IPv6 flow label handling code (ip6_flowlabel.c) in Linux kernels 2.4 up to 2.4.32 and 2.6 before 2.6.14 modifies the wrong variable in certain circumstances, which allows local users to corrupt kernel memory or cause a denial of service (crash) by triggering a free of non-allocated memory.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9903
http://wwwnew.mandriva.com/security/advisories?name=MDKSA-2006:044
http://www.securityfocus.com/bid/15729
http://www.securityfocus.com/archive/1/428058/100/0/threaded
http://www.securityfocus.com/archive/1/428028/100/0/threaded
http://www.securityfocus.com/archive/1/427981/100/0/threaded
http://www.securityfocus.com/archive/1/419522/100/0/threaded
http://www.securityfocus.com/advisories/9806
http://www.redhat.com/support/errata/RHSA-2006-0191.html
http://www.redhat.com/support/errata/RHSA-2006-0190.html
http://www.redhat.com/support/errata/RHSA-2006-0140.html
http://www.redhat.com/support/errata/RHSA-2006-0101.html
http://www.mandriva.com/security/advisories?name=MDKSA-2006:072
http://www.mandriva.com/security/advisories?name=MDKSA-2006:018
http://www.debian.org/security/2006/dsa-1018
http://www.debian.org/security/2006/dsa-1017
http://secunia.com/advisories/19374
http://secunia.com/advisories/19369
http://secunia.com/advisories/18977
http://secunia.com/advisories/18684
http://secunia.com/advisories/18562
http://secunia.com/advisories/18510
http://secunia.com/advisories/18203
http://secunia.com/advisories/17918