Issued:
2020-01-14
Updated:
2020-01-14

RHSA-2020:0100 - Important: kernel-rt security and bug fix update

Synopsis

Important: kernel-rt security and bug fix update

Type/Severity

Security Advisory Important

Topic

An update for kernel-rt is now available for Red Hat Enterprise MRG 2.

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.

Description

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 in __blk_drain_queue() function in block/blk-core.c (CVE-2018-20856)

  • kernel: TLB flush happens too late on mremap (CVE-2018-18281)

  • kernel: fix race condition between mmget_not_zero()/get_task_mm() and core dumping (CVE-2019-11599)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Bug Fix(es):

  • update the MRG 2.5.z 3.10 realtime-kernel sources (BZ#1779367)

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Affected Products

ProductVersionArch
MRG Realtime2x86_64

Updated Packages

  • kernel-rt-doc-3.10.0-693.62.1.rt56.659.el6rt.noarch.rpm
  • kernel-rt-debug-debuginfo-3.10.0-693.62.1.rt56.659.el6rt.x86_64.rpm
  • kernel-rt-trace-debuginfo-3.10.0-693.62.1.rt56.659.el6rt.x86_64.rpm
  • kernel-rt-trace-devel-3.10.0-693.62.1.rt56.659.el6rt.x86_64.rpm
  • kernel-rt-firmware-3.10.0-693.62.1.rt56.659.el6rt.noarch.rpm
  • kernel-rt-devel-3.10.0-693.62.1.rt56.659.el6rt.x86_64.rpm
  • kernel-rt-debug-3.10.0-693.62.1.rt56.659.el6rt.x86_64.rpm
  • kernel-rt-debuginfo-3.10.0-693.62.1.rt56.659.el6rt.x86_64.rpm
  • kernel-rt-vanilla-3.10.0-693.62.1.rt56.659.el6rt.x86_64.rpm
  • kernel-rt-vanilla-debuginfo-3.10.0-693.62.1.rt56.659.el6rt.x86_64.rpm
  • kernel-rt-3.10.0-693.62.1.rt56.659.el6rt.x86_64.rpm
  • kernel-rt-debug-devel-3.10.0-693.62.1.rt56.659.el6rt.x86_64.rpm
  • kernel-rt-trace-3.10.0-693.62.1.rt56.659.el6rt.x86_64.rpm
  • kernel-rt-debuginfo-common-x86_64-3.10.0-693.62.1.rt56.659.el6rt.x86_64.rpm
  • kernel-rt-3.10.0-693.62.1.rt56.659.el6rt.src.rpm
  • kernel-rt-vanilla-devel-3.10.0-693.62.1.rt56.659.el6rt.x86_64.rpm

Fixes

CVEs

References

Additional information