Issued:
2019-09-20
Updated:
2019-09-20

RHSA-2019:2828 - Important: kernel-rt security update

Synopsis

Important: kernel-rt security update

Type/Severity

Security Advisory Important

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.

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):

  • A buffer overflow flaw was found in the way Linux kernel's vhost functionality that translates virtqueue buffers to IOVs, logged the buffer descriptors during migration. A privileged guest user able to pass descriptors with invalid length to the host when migration is underway, could use this flaw to increase their privileges on the host. (CVE-2019-14835)

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
Red Hat Enterprise Linux for x86_64 - Extended Update Support Extension8.8x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support Extension8.6x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support Extension8.4x86_64
Red Hat Enterprise Linux for Real Time8x86_64
Red Hat Enterprise Linux for Real Time for NFV8x86_64
Red Hat Enterprise Linux for Real Time for NFV - Telecommunications Update Service8.8x86_64
Red Hat Enterprise Linux for Real Time for NFV - Telecommunications Update Service8.6x86_64
Red Hat Enterprise Linux for Real Time for NFV - Telecommunications Update Service8.4x86_64
Red Hat Enterprise Linux for Real Time for NFV - Telecommunications Update Service8.2x86_64
Red Hat Enterprise Linux for Real Time - Telecommunications Update Service8.8x86_64
Red Hat Enterprise Linux for Real Time - Telecommunications Update Service8.6x86_64
Red Hat Enterprise Linux for Real Time - Telecommunications Update Service8.4x86_64
Red Hat Enterprise Linux for Real Time - Telecommunications Update Service8.2x86_64

Updated Packages

  • kernel-rt-debug-modules-4.18.0-80.11.2.rt9.157.el8_0.x86_64.rpm
  • kernel-rt-debuginfo-common-x86_64-4.18.0-80.11.2.rt9.157.el8_0.x86_64.rpm
  • kernel-rt-modules-4.18.0-80.11.2.rt9.157.el8_0.x86_64.rpm
  • kernel-rt-debug-kvm-debuginfo-4.18.0-80.11.2.rt9.157.el8_0.x86_64.rpm
  • kernel-rt-debug-devel-4.18.0-80.11.2.rt9.157.el8_0.x86_64.rpm
  • kernel-rt-4.18.0-80.11.2.rt9.157.el8_0.src.rpm
  • kernel-rt-kvm-debuginfo-4.18.0-80.11.2.rt9.157.el8_0.x86_64.rpm
  • kernel-rt-kvm-4.18.0-80.11.2.rt9.157.el8_0.x86_64.rpm
  • kernel-rt-debug-modules-extra-4.18.0-80.11.2.rt9.157.el8_0.x86_64.rpm
  • kernel-rt-debug-debuginfo-4.18.0-80.11.2.rt9.157.el8_0.x86_64.rpm
  • kernel-rt-modules-extra-4.18.0-80.11.2.rt9.157.el8_0.x86_64.rpm
  • kernel-rt-devel-4.18.0-80.11.2.rt9.157.el8_0.x86_64.rpm
  • kernel-rt-core-4.18.0-80.11.2.rt9.157.el8_0.x86_64.rpm
  • kernel-rt-debug-kvm-4.18.0-80.11.2.rt9.157.el8_0.x86_64.rpm
  • kernel-rt-debuginfo-4.18.0-80.11.2.rt9.157.el8_0.x86_64.rpm
  • kernel-rt-debug-core-4.18.0-80.11.2.rt9.157.el8_0.x86_64.rpm
  • kernel-rt-4.18.0-80.11.2.rt9.157.el8_0.x86_64.rpm
  • kernel-rt-debug-4.18.0-80.11.2.rt9.157.el8_0.x86_64.rpm

Fixes

CVEs

References

Additional information