Issued:
2023-03-27
Updated:
2023-03-27

RHSA-2023:1469 - 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 9.

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: tun: avoid double free in tun_free_netdev (CVE-2022-4744)

  • ALSA: pcm: Move rwsem lock inside snd_ctl_elem_read to prevent UAF (CVE-2023-0266)

  • kernel: net: CPU soft lockup in TC mirred egress-to-ingress action (CVE-2022-4269)

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):

  • kernel-rt: update RT source tree to the latest RHEL-9.1.z3 Batch (BZ#2170460)

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_649x86_64
Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions9.6x86_64
Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions9.4x86_64
Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions9.2x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support9.6x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support9.4x86_64
Red Hat Enterprise Linux for x86_64 - Extended Life Cycle9.6x86_64
Red Hat Enterprise Linux for x86_64 - Extended Life Cycle9.4x86_64
Red Hat Enterprise Linux for x86_64 - Extended Life Cycle9.2x86_64

Updated Packages

  • kernel-rt-5.14.0-162.22.2.rt21.186.el9_1.x86_64.rpm
  • kernel-rt-debug-modules-extra-5.14.0-162.22.2.rt21.186.el9_1.x86_64.rpm
  • kernel-rt-5.14.0-162.22.2.rt21.186.el9_1.src.rpm
  • kernel-rt-core-5.14.0-162.22.2.rt21.186.el9_1.x86_64.rpm
  • kernel-rt-debug-kvm-5.14.0-162.22.2.rt21.186.el9_1.x86_64.rpm
  • kernel-rt-modules-extra-5.14.0-162.22.2.rt21.186.el9_1.x86_64.rpm
  • kernel-rt-debug-5.14.0-162.22.2.rt21.186.el9_1.x86_64.rpm
  • kernel-rt-kvm-5.14.0-162.22.2.rt21.186.el9_1.x86_64.rpm
  • kernel-rt-debug-devel-5.14.0-162.22.2.rt21.186.el9_1.x86_64.rpm
  • kernel-rt-modules-5.14.0-162.22.2.rt21.186.el9_1.x86_64.rpm
  • kernel-rt-debug-debuginfo-5.14.0-162.22.2.rt21.186.el9_1.x86_64.rpm
  • kernel-rt-debug-core-5.14.0-162.22.2.rt21.186.el9_1.x86_64.rpm
  • kernel-rt-devel-5.14.0-162.22.2.rt21.186.el9_1.x86_64.rpm
  • kernel-rt-debug-modules-5.14.0-162.22.2.rt21.186.el9_1.x86_64.rpm
  • kernel-rt-debuginfo-5.14.0-162.22.2.rt21.186.el9_1.x86_64.rpm
  • kernel-rt-debuginfo-common-x86_64-5.14.0-162.22.2.rt21.186.el9_1.x86_64.rpm

Fixes

CVEs

References

Additional information