Issued:
2022-10-25
Updated:
2022-10-25

RHSA-2022:7134 - 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: a use-after-free in cls_route filter implementation may lead to privilege escalation (CVE-2022-2588)

  • kernel: information leak in scsi_ioctl() (CVE-2022-0494)

  • Kernel: A kernel-info-leak issue in pfkey_register (CVE-2022-1353)

  • hw: cpu: AMD: RetBleed Arbitrary Speculative Code Execution with Return Instructions (CVE-2022-23816, CVE-2022-29900)

  • hw: cpu: AMD: Branch Type Confusion (non-retbleed) (CVE-2022-23825)

  • hw: cpu: Intel: RetBleed Arbitrary Speculative Code Execution with Return Instructions (CVE-2022-29901)

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] BUG: using __this_cpu_add() in preemptible [00000000] - caller is __mod_memcg_lruvec_state+0x69/0x1c0 (BZ#2122600)

  • The latest RHEL 8.6.z4 kernel changes need to be merged into the RT source tree to keep source parity between the two kernels. (BZ#2125396)

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-debuginfo-common-x86_64-4.18.0-372.32.1.rt7.189.el8_6.x86_64.rpm
  • kernel-rt-debug-devel-4.18.0-372.32.1.rt7.189.el8_6.x86_64.rpm
  • kernel-rt-4.18.0-372.32.1.rt7.189.el8_6.src.rpm
  • kernel-rt-devel-4.18.0-372.32.1.rt7.189.el8_6.x86_64.rpm
  • kernel-rt-modules-4.18.0-372.32.1.rt7.189.el8_6.x86_64.rpm
  • kernel-rt-debug-modules-4.18.0-372.32.1.rt7.189.el8_6.x86_64.rpm
  • kernel-rt-kvm-4.18.0-372.32.1.rt7.189.el8_6.x86_64.rpm
  • kernel-rt-debug-debuginfo-4.18.0-372.32.1.rt7.189.el8_6.x86_64.rpm
  • kernel-rt-modules-extra-4.18.0-372.32.1.rt7.189.el8_6.x86_64.rpm
  • kernel-rt-4.18.0-372.32.1.rt7.189.el8_6.x86_64.rpm
  • kernel-rt-debug-modules-extra-4.18.0-372.32.1.rt7.189.el8_6.x86_64.rpm
  • kernel-rt-debug-core-4.18.0-372.32.1.rt7.189.el8_6.x86_64.rpm
  • kernel-rt-debug-kvm-4.18.0-372.32.1.rt7.189.el8_6.x86_64.rpm
  • kernel-rt-debuginfo-4.18.0-372.32.1.rt7.189.el8_6.x86_64.rpm
  • kernel-rt-core-4.18.0-372.32.1.rt7.189.el8_6.x86_64.rpm
  • kernel-rt-debug-4.18.0-372.32.1.rt7.189.el8_6.x86_64.rpm

Fixes

CVEs

References

Additional information