Issued:
2023-02-21
Updated:
2023-02-21

RHSA-2023:0854 - 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.

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: mm/mremap.c use-after-free vulnerability (CVE-2022-41222)

  • kernel: nfsd buffer overflow by RPC message over TCP with garbage data (CVE-2022-43945)

  • kernel: an out-of-bounds vulnerability in i2c-ismt driver (CVE-2022-2873)

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):

  • RHEL8-RT: Backport use of a dedicate thread for timer wakeups (BZ#2127204)

  • SNO Crashed twice - kernel BUG at lib/list_debug.c:28 (BZ#2132062)

  • Cannot trigger kernel dump using NMI on SNO node running PAO and RT kernel [RT-8] (BZ#2139851)

  • scheduling while atomic in fpu_clone() -> fpu_inherit_perms() (BZ#2154469)

  • The latest RHEL 8.7.z2 kernel changes need to be merged into the RT source tree to keep source parity between the two kernels. (BZ#2159806)

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 Life Cycle8.10x86_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 - Telecommunications Update Service8.8x86_64

Updated Packages

  • kernel-rt-kvm-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
  • kernel-rt-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
  • kernel-rt-debug-devel-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
  • kernel-rt-debug-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
  • kernel-rt-debug-core-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
  • kernel-rt-debug-modules-extra-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
  • kernel-rt-core-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
  • kernel-rt-debug-debuginfo-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
  • kernel-rt-debuginfo-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
  • kernel-rt-4.18.0-425.13.1.rt7.223.el8_7.src.rpm
  • kernel-rt-debug-modules-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
  • kernel-rt-modules-extra-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
  • kernel-rt-modules-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
  • kernel-rt-debug-kvm-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
  • kernel-rt-debuginfo-common-x86_64-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
  • kernel-rt-devel-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm

Fixes

CVEs

References

Additional information