Issued:
2022-11-01
Updated:
2022-11-01

RHSA-2022:7280 - 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 Linux 8.2 Telecommunications Update Service.

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 use-after-free in cls_route filter implementation may lead to privilege escalation (CVE-2022-2588)

  • Incomplete cleanup of multi-core shared buffers (aka SBDR) (CVE-2022-21123)

  • Incomplete cleanup of microarchitectural fill buffers (aka SBDS) (CVE-2022-21125)

  • Incomplete cleanup in specific special register write operations (aka DRPW) (CVE-2022-21166)

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 RT source tree to the latest RHEL-8.2.z21 Batch (BZ#2100575)

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 Time for NFV - Telecommunications Update Service8.2x86_64
Red Hat Enterprise Linux for Real Time - Telecommunications Update Service8.2x86_64

Updated Packages

  • kernel-rt-debug-devel-4.18.0-193.93.1.rt13.143.el8_2.x86_64.rpm
  • kernel-rt-4.18.0-193.93.1.rt13.143.el8_2.x86_64.rpm
  • kernel-rt-modules-4.18.0-193.93.1.rt13.143.el8_2.x86_64.rpm
  • kernel-rt-devel-4.18.0-193.93.1.rt13.143.el8_2.x86_64.rpm
  • kernel-rt-debug-modules-4.18.0-193.93.1.rt13.143.el8_2.x86_64.rpm
  • kernel-rt-debuginfo-common-x86_64-4.18.0-193.93.1.rt13.143.el8_2.x86_64.rpm
  • kernel-rt-modules-extra-4.18.0-193.93.1.rt13.143.el8_2.x86_64.rpm
  • kernel-rt-debug-debuginfo-4.18.0-193.93.1.rt13.143.el8_2.x86_64.rpm
  • kernel-rt-debug-modules-extra-4.18.0-193.93.1.rt13.143.el8_2.x86_64.rpm
  • kernel-rt-kvm-4.18.0-193.93.1.rt13.143.el8_2.x86_64.rpm
  • kernel-rt-4.18.0-193.93.1.rt13.143.el8_2.src.rpm
  • kernel-rt-debug-core-4.18.0-193.93.1.rt13.143.el8_2.x86_64.rpm
  • kernel-rt-debuginfo-4.18.0-193.93.1.rt13.143.el8_2.x86_64.rpm
  • kernel-rt-debug-kvm-4.18.0-193.93.1.rt13.143.el8_2.x86_64.rpm
  • kernel-rt-core-4.18.0-193.93.1.rt13.143.el8_2.x86_64.rpm
  • kernel-rt-debug-4.18.0-193.93.1.rt13.143.el8_2.x86_64.rpm

Fixes

CVEs

References

Additional information