nf_conntrack in netfilter in the Linux kernel before 2.6.20.3 does not set nfctinfo during reassembly of fragmented packets, which leaves the default value as IP_CT_ESTABLISHED and might allow remote attackers to bypass certain rulesets using IPv6 fragments.
secunia.com/advisories/24492
secunia.com/advisories/25228
secunia.com/advisories/25288
secunia.com/advisories/25392
secunia.com/advisories/25961
secunia.com/advisories/26620
www.debian.org/security/2007/dsa-1289
www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.20.3
www.mandriva.com/security/advisories?name=MDKSA-2007:171
www.mandriva.com/security/advisories?name=MDKSA-2007:196
www.novell.com/linux/security/advisories/2007_43_kernel.html
www.osvdb.org/33028
www.redhat.com/support/errata/RHSA-2007-0347.html
www.securityfocus.com/bid/23976
www.ubuntu.com/usn/usn-464-1
www.vupen.com/english/advisories/2007/0944
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10457