Red Hat Security Advisory 2016-1883-01 – The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. The kernel-rt packages have been upgraded to version 3.10.0-327.rt56.197, which provides a number of bug fixes over the previous version. Security Fix: A security flaw was found in the Linux kernel in the mark_source_chains() function in “net/ipv4/netfilter/ip_tables.c”. It is possible for a user-supplied “ipt_entry” structure to have a large “next_offset” field. This field is not bounds checked prior to writing to a counter value at the supplied offset.