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Red Hat Enterprise Linux 8.2: RHSA-2021-3909 Moderate: Kernel-RT KVM Issues

red hat
Calendar Grey October 19, 2021
Dist Redhat Esm H88
Incremental upgrades for Fedora's kernel-rt tackle vulnerability concerns, boosting overall system reliability and efficiency.
An update for kernel-rt is now available for Red Hat Enterprise Linux 8.2 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: SVM nested virtualization issue in KVM (AVIC support) (CVE-2021-3653)
* kernel: SVM nested virtualization issue in KVM (VMLOAD/VMSAVE) (CVE-2021-3656)
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 RHEL-8.2.z source tree (BZ#2009052)

Topics%20covered

Topics Covered

security advisory moderate update Red Hat Enterprise Linux security impact kernel-rt KVM issue

References

https://access.redhat.com/security/cve/CVE-2021-3653 https://access.redhat.com/security/cve/CVE-2021-3656 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2):
Source: kernel-rt-4.18.0-193.68.1.rt13.118.el8_2.src.rpm
x86_64: kernel-rt-4.18.0-193.68.1.rt13.118.el8_2.x86_64.rpm kernel-rt-core-4.18.0-193.68.1.rt13.118.el8_2.x86_64.rpm kernel-rt-debug-4.18.0-193.68.1.rt13.118.el8_2.x86_64.rpm kernel-rt-debug-core-4.18.0-193.68.1.rt13.118.el8_2.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-193.68.1.rt13.118.el8_2.x86_64.rpm kernel-rt-debug-devel-4.18.0-193.68.1.rt13.118.el8_2.x86_64.rpm kernel-rt-debug-kvm-4.18.0-193.68.1.rt13.118.el8_2.x86_64.rpm kernel-rt-debug-modules-4.18.0-193.68.1.rt13.118.el8_2.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-193.68.1.rt13.118.el8_2.x86_64.rpm kernel-rt-debuginfo-4.18.0-193.68.1.rt13.118.el8_2.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-193.68.1.rt13.118.el8_2.x86_64.rpm kernel-rt-devel-4.18.0-193.68.1.rt13.118.el8_2.x86_64.rpm kernel-rt-kvm-4.18.0-193.68.1.rt13.118.el8_2.x86_64.rpm kernel-rt-modules-4.18.0-193.68.1.rt13.118.el8_2.x86_64.rpm kernel-rt-modules-extra-4.18.0-193.68.1.rt13.118.el8_2.x86_64.rpm
Red Hat Enterprise Linux Real Time EUS (v. 8.2):
Source: kernel-rt-4.18.0-193.68.1.rt13.118.el8_2.src.rpm
x86_64: kernel-rt-4.18.0-193.68.1.rt13.118.el8_2.x86_64.rpm kernel-rt-core-4.18.0-193.68.1.rt13.118.el8_2.x86_64.rpm

Read the Full Advisory


Advisory ID: RHSA-2021:3909-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:3909
Issue date: 2021-10-19

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.2Extended Update Support.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory moderate update Red Hat Enterprise Linux security impact kernel-rt KVM issue

Relevant Releases Architectures

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

Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2) - x86_64

Bugs Fixed

1983686 - CVE-2021-3653 kernel: SVM nested virtualization issue in KVM (AVIC support)

1983988 - CVE-2021-3656 kernel: SVM nested virtualization issue in KVM (VMLOAD/VMSAVE)

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