RHSA-2018:3586: Important: kernel-rt security and bug fix update

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.<br>Security Fix(es):<br><li> A flaw named FragmentSmack was found in the way the Linux kernel handled reassembly of fragmented IPv4 and IPv6 packets. A remote attacker could use this flaw to trigger time and calculation expensive fragment reassembly algorithm by sending specially crafted packets which could lead to a CPU saturation and hence a denial of service on the system. (CVE-2018-5391)</li> <li> kernel: out-of-bounds access in the showtimer function in kernel/time/posix-timers.c (CVE-2017-18344)</li> <li> kernel: mm: use-after-free in dogetmempolicy function allows local DoS or other unspecified impact (CVE-2018-10675)</li> <li> kernel: Integer overflow in Linux's createelftables function (CVE-2018-14634)</li> For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.<br>Red Hat would like to thank Juha-Matti Tilli (Aalto University - Department of Communications and Networking and Nokia Bell Labs) for reporting CVE-2018-5391 and Qualys Research Labs for reporting CVE-2018-14634.<br>Bug Fix(es):<br><li> The kernel-rt packages have been upgraded to the 3.10.0-693.43.1 source tree, which provides a number of bug fixes over the previous version. (BZ#1632422)</li>