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Red Hat 9.0: RHSA-2022-8974-01 Important: Kernel-Rt Bug Fix

red hat
Calendar Grey December 13, 2022
Scroller Redhat
The recent kernel-rt update for Red Hat resolves critical vulnerabilities and introduces several bug corrections. Discover the effects this may have and the recommended actions to take.
An update for kernel-rt is now available for Red Hat Enterprise Linux 9.0 Extended Update Support

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.

Summary

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)

Topics%20covered

Topics Covered

security advisory Red Hat buffer overflow privilege escalation bug fix important kernel-rt

References

https://access.redhat.com/security/cve/CVE-2022-1158 https://access.redhat.com/security/cve/CVE-2022-2639 https://access.redhat.com/security/cve/CVE-2022-2959 https://access.redhat.com/security/cve/CVE-2022-21123 https://access.redhat.com/security/cve/CVE-2022-21125 https://access.redhat.com/security/cve/CVE-2022-21166 https://access.redhat.com/security/cve/CVE-2022-23816 https://access.redhat.com/security/cve/CVE-2022-23825 https://access.redhat.com/security/cve/CVE-2022-26373 https://access.redhat.com/security/cve/CVE-2022-29900 https://access.redhat.com/security/cve/CVE-2022-29901 https://access.redhat.com/security/cve/CVE-2022-43945 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/solutions/6971358

Package List

Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0):
Source: kernel-rt-5.14.0-70.36.1.rt21.108.el9_0.src.rpm
x86_64: kernel-rt-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-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 kernel-rt-debug-debuginfo-5.14.0-70.36.1.rt21.108.el9_0.x86_64.rpm kernel-rt-debug-devel-5.14.0-70.36.1.rt21.108.el9_0.x86_64.rpm kernel-rt-debug-kvm-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-debug-modules-extra-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-debuginfo-common-x86_64-5.14.0-70.36.1.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-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-modules-extra-5.14.0-70.36.1.rt21.108.el9_0.x86_64.rpm
Red Hat Enterprise Linux Real Time EUS (v.9.0):
Source: kernel-rt-5.14.0-70.36.1.rt21.108.el9_0.src.rpm
x86_64: kernel-rt-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

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2022:8974-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:8974
Issue date: 2022-12-13

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.0Extended Update Support.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat buffer overflow privilege escalation bug fix important kernel-rt

Relevant Releases Architectures

Red Hat Enterprise Linux Real Time EUS (v.9.0) - x86_64

Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0) - x86_64

Bugs Fixed

2069793 - CVE-2022-1158 kernel: KVM: cmpxchg_gpte can write to pfns outside the userspace region

2084479 - CVE-2022-2639 kernel: openvswitch: integer underflow leads to out-of-bounds write in reserve_sfa_size()

2090226 - CVE-2022-23816 CVE-2022-29900 hw: cpu: AMD: RetBleed Arbitrary Speculative Code Execution with Return Instructions

2090237 - CVE-2022-21123 hw: cpu: incomplete clean-up of multi-core shared buffers (aka SBDR)

2090240 - CVE-2022-21125 hw: cpu: incomplete clean-up of microarchitectural fill buffers (aka SBDS)

2090241 - CVE-2022-21166 hw: cpu: incomplete clean-up in specific special register write operations (aka DRPW)

2103148 - CVE-2022-29901 hw: cpu: Intel: RetBleed Arbitrary Speculative Code Execution with Return Instructions

2103153 - CVE-2022-23825 hw: cpu: AMD: Branch Type Confusion (non-retbleed)

2103681 - CVE-2022-2959 kernel: watch queue race condition can lead to privilege escalation

2115065 - CVE-2022-26373 hw: cpu: Intel: Post-barrier Return Stack Buffer Predictions

2141752 - CVE-2022-43945 kernel: nfsd buffer overflow by RPC message over TCP with garbage data

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