Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A denial of service attack vulnerability exists in the Linux Kernel. The vulnerability is due to a memory leak found in ctnetlink_create_conntrack in net/netfilter/nf_conntrack_netlink.c in the Linux kernel. A local attacker can exploit this vulnerability to cause a denial of service (DoS) attack due to a reference count overflow.