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Red Hat: RHSA-2022-8941 Important: Kernel-RT Security and Bug Fix

red hat
Calendar Grey December 13, 2022
Dist Redhat Esm H88
The latest update from Red Hat focuses on enhancing kernel-rt security, tackling several high-priority vulnerabilities for Enterprise Linux clients.
An update for kernel-rt is now available for Red Hat Enterprise Linux 8.2 Telecommunications Update Service

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)
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-8.2.z22 Batch (BZ#2138929)

Topics%20covered

Topics Covered

security advisory security issue Red Hat bug fix important KVM 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/updates/classification/#important

Package List

Red Hat Enterprise Linux Real Time for NFV TUS (v. 8.2):
Source: kernel-rt-4.18.0-193.95.1.rt13.146.el8_2.src.rpm
x86_64: kernel-rt-4.18.0-193.95.1.rt13.146.el8_2.x86_64.rpm kernel-rt-core-4.18.0-193.95.1.rt13.146.el8_2.x86_64.rpm kernel-rt-debug-4.18.0-193.95.1.rt13.146.el8_2.x86_64.rpm kernel-rt-debug-core-4.18.0-193.95.1.rt13.146.el8_2.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-193.95.1.rt13.146.el8_2.x86_64.rpm kernel-rt-debug-devel-4.18.0-193.95.1.rt13.146.el8_2.x86_64.rpm kernel-rt-debug-kvm-4.18.0-193.95.1.rt13.146.el8_2.x86_64.rpm kernel-rt-debug-modules-4.18.0-193.95.1.rt13.146.el8_2.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-193.95.1.rt13.146.el8_2.x86_64.rpm kernel-rt-debuginfo-4.18.0-193.95.1.rt13.146.el8_2.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-193.95.1.rt13.146.el8_2.x86_64.rpm kernel-rt-devel-4.18.0-193.95.1.rt13.146.el8_2.x86_64.rpm kernel-rt-kvm-4.18.0-193.95.1.rt13.146.el8_2.x86_64.rpm kernel-rt-modules-4.18.0-193.95.1.rt13.146.el8_2.x86_64.rpm kernel-rt-modules-extra-4.18.0-193.95.1.rt13.146.el8_2.x86_64.rpm
Red Hat Enterprise Linux Real Time TUS (v. 8.2):
Source: kernel-rt-4.18.0-193.95.1.rt13.146.el8_2.src.rpm
x86_64: kernel-rt-4.18.0-193.95.1.rt13.146.el8_2.x86_64.rpm kernel-rt-core-4.18.0-193.95.1.rt13.146.el8_2.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2022:8941-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:8941
Issue date: 2022-12-13

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.2Telecommunications Update Service.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 security issue Red Hat bug fix important KVM kernel-rt

Relevant Releases Architectures

Red Hat Enterprise Linux Real Time TUS (v. 8.2) - x86_64

Red Hat Enterprise Linux Real Time for NFV TUS (v. 8.2) - 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()

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