The udp_queue_rcv_skb function in net/ipv4/udp.c in a certain Red Hat
build of the Linux kernel 2.6.18 in Red Hat Enterprise Linux (RHEL) 5
allows attackers to cause a denial of service (deadlock and system
hang) by sending UDP traffic to a socket that has a crafted socket
filter, a related issue to CVE-2010-4158.
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