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From the Novell Bugzilla entry:
SYN+FIN attacks can cause a denial of service condition:
https://git.kernel.org/?p=linux/kernel/git/davem/net-next.git;a=commitdiff;h=fdf5af0daf8019cec2396cdef8fb042d80fe71fa
While this issue was initially reported as a denial of service flaw, it also alows attackers to bypass certain iptables rules:
http://www.spinics.net/lists/netfilter-devel/msg21248.html
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