Issued:
2020-11-10
Updated:
2020-11-10

RHSA-2020:5026 - Moderate: kernel-rt security and bug fix update

Synopsis

Moderate: kernel-rt security and bug fix update

Type/Severity

Security Advisory Moderate

Topic

An 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 Moderate. 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: kernel: buffer over write in vgacon_scroll (CVE-2020-14331)

  • kernel: net-sysfs: *_queue_add_kobject refcount issue (CVE-2019-20811)

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):

  • [RHEL-7.9] net/ipv6/ip6_flowlabel.c:85 suspicious rcu_dereference_check() usage! (kernel-rt-debug) (BZ#1836846)

  • md/raid: sleeping function called from invalid context triggered by CKI storage/swraid/trim test (BZ#1857872)

  • Infinite looping when trying to acquire eventpoll->mtx during eventpoll_release_file, 2nd try (BZ#1877695)

  • kernel-rt: update to the latest RHEL7.9.z1 source tree (BZ#1883995)

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 Real Time7x86_64
Red Hat Enterprise Linux for Real Time for NFV7x86_64

Updated Packages

  • kernel-rt-debuginfo-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm
  • kernel-rt-doc-3.10.0-1160.6.1.rt56.1139.el7.noarch.rpm
  • kernel-rt-kvm-debuginfo-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm
  • kernel-rt-kvm-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm
  • kernel-rt-trace-debuginfo-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm
  • kernel-rt-debug-debuginfo-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm
  • kernel-rt-devel-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm
  • kernel-rt-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm
  • kernel-rt-trace-devel-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm
  • kernel-rt-3.10.0-1160.6.1.rt56.1139.el7.src.rpm
  • kernel-rt-debug-kvm-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm
  • kernel-rt-trace-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm
  • kernel-rt-debug-kvm-debuginfo-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm
  • kernel-rt-debug-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm
  • kernel-rt-debuginfo-common-x86_64-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm
  • kernel-rt-debug-devel-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm
  • kernel-rt-trace-kvm-debuginfo-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm
  • kernel-rt-trace-kvm-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm

Fixes

CVEs

References

Additional information