Issued:
2022-12-13
Updated:
2022-12-13

RHSA-2022:8974 - 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 9.0 Extended Update Support.

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: KVM: cmpxchg_gpte can write to pfns outside the userspace region (CVE-2022-1158)

  • kernel: openvswitch: integer underflow leads to out-of-bounds write in reserve_sfa_size() (CVE-2022-2639)

  • kernel: watch queue race condition can lead to privilege escalation (CVE-2022-2959)

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

  • hw: cpu: incomplete clean-up of multi-core shared buffers (aka SBDR) (CVE-2022-21123)

  • hw: cpu: incomplete clean-up of microarchitectural fill buffers (aka SBDS) (CVE-2022-21125)

  • hw: cpu: incomplete clean-up in specific special register write operations (aka DRPW) (CVE-2022-21166)

  • 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: Post-barrier Return Stack Buffer Predictions (CVE-2022-26373)

  • 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):

  • kernel-rt: update RT source tree to the latest RHEL-9.0.z5 Batch (BZ#2137580)

  • [DELL EMC 9.0-RT BUG] System is not booting into RT Kernel with perc12 [kernel-rt] (BZ#2139864)

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 - Update Services for SAP Solutions9.0x86_64

Updated Packages

  • kernel-rt-debug-devel-5.14.0-70.36.1.rt21.108.el9_0.x86_64.rpm
  • kernel-rt-kvm-5.14.0-70.36.1.rt21.108.el9_0.x86_64.rpm
  • kernel-rt-debug-5.14.0-70.36.1.rt21.108.el9_0.x86_64.rpm
  • kernel-rt-debug-modules-extra-5.14.0-70.36.1.rt21.108.el9_0.x86_64.rpm
  • kernel-rt-5.14.0-70.36.1.rt21.108.el9_0.src.rpm
  • kernel-rt-debug-kvm-5.14.0-70.36.1.rt21.108.el9_0.x86_64.rpm
  • kernel-rt-modules-5.14.0-70.36.1.rt21.108.el9_0.x86_64.rpm
  • kernel-rt-debug-modules-5.14.0-70.36.1.rt21.108.el9_0.x86_64.rpm
  • kernel-rt-devel-5.14.0-70.36.1.rt21.108.el9_0.x86_64.rpm
  • kernel-rt-modules-extra-5.14.0-70.36.1.rt21.108.el9_0.x86_64.rpm
  • kernel-rt-debuginfo-common-x86_64-5.14.0-70.36.1.rt21.108.el9_0.x86_64.rpm
  • kernel-rt-core-5.14.0-70.36.1.rt21.108.el9_0.x86_64.rpm
  • kernel-rt-debug-debuginfo-5.14.0-70.36.1.rt21.108.el9_0.x86_64.rpm
  • kernel-rt-debuginfo-5.14.0-70.36.1.rt21.108.el9_0.x86_64.rpm
  • kernel-rt-5.14.0-70.36.1.rt21.108.el9_0.x86_64.rpm
  • kernel-rt-debug-core-5.14.0-70.36.1.rt21.108.el9_0.x86_64.rpm

Fixes

CVEs

References

Additional information