SynopsisThe remote Red Hat host is missing one or more security updates.
DescriptionAn update for kernel-rt is now available for Red Hat Enterprise Linux 7.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.
Security Fix(es) :
* kernel: Use-after-free due to race condition in AF_PACKET implementation (CVE-2018-18559)
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.
Bug Fix(es) :
* The kernel-rt packages have been upgraded to the 3.10.0-957.5.1 source tree, which provides a number of bug fixes over the previous version. (BZ# 1653822)
* Under certain circumstances, the following warning message, which indicated a SCHED_DEADLINE bandwidth tracking mechanism error, occurred :
WARNING: CPU: 8 PID: 19536 at kernel/sched/deadline.c:64 dequeue_task_dl+0x121/ 0x140
This update fixes the sched_setscheduler() core kernel function, and backports multiple upstream patches to the SCHED_DEADLINE scheduler.
As a result, the SCHED_DEADLINE bandwidth tracking mechanism is prevented from error conditions, and the warning message no longer occurs. (BZ#1655439)
SolutionUpdate the affected packages.