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Red Hat Enterprise 8.2 RHSA-2021-3904 Moderate: Kernel Security Issues

red hat
Calendar Grey October 19, 2021
Dist Redhat Esm H88
An upgrade for CentOS Linux 8.2 tackles notable kernel challenges, improving performance and safety.
An update for kernel 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 packages contain the Linux kernel, the core of any Linux operating system.
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):
* RHEL8.2 - s390/vtime: fix increased steal time accounting (BZ#1988387)
* Backport 22e4663e91 ("mm/slub: fix panic in slab_alloc_node()") (BZ#1996078)
* Kernel panic at n_tty_set_termios+0x30 (BZ#1998000)

Topics%20covered

Topics Covered

security advisory kernel update bug fix Red Hat Enterprise Linux virtualization KVM issue moderate vulnerability

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 BaseOS EUS (v. 8.2):
Source: kernel-4.18.0-193.68.1.el8_2.src.rpm
aarch64: bpftool-4.18.0-193.68.1.el8_2.aarch64.rpm bpftool-debuginfo-4.18.0-193.68.1.el8_2.aarch64.rpm kernel-4.18.0-193.68.1.el8_2.aarch64.rpm kernel-core-4.18.0-193.68.1.el8_2.aarch64.rpm kernel-cross-headers-4.18.0-193.68.1.el8_2.aarch64.rpm kernel-debug-4.18.0-193.68.1.el8_2.aarch64.rpm kernel-debug-core-4.18.0-193.68.1.el8_2.aarch64.rpm kernel-debug-debuginfo-4.18.0-193.68.1.el8_2.aarch64.rpm kernel-debug-devel-4.18.0-193.68.1.el8_2.aarch64.rpm kernel-debug-modules-4.18.0-193.68.1.el8_2.aarch64.rpm kernel-debug-modules-extra-4.18.0-193.68.1.el8_2.aarch64.rpm kernel-debuginfo-4.18.0-193.68.1.el8_2.aarch64.rpm kernel-debuginfo-common-aarch64-4.18.0-193.68.1.el8_2.aarch64.rpm kernel-devel-4.18.0-193.68.1.el8_2.aarch64.rpm kernel-headers-4.18.0-193.68.1.el8_2.aarch64.rpm kernel-modules-4.18.0-193.68.1.el8_2.aarch64.rpm kernel-modules-extra-4.18.0-193.68.1.el8_2.aarch64.rpm kernel-tools-4.18.0-193.68.1.el8_2.aarch64.rpm kernel-tools-debuginfo-4.18.0-193.68.1.el8_2.aarch64.rpm kernel-tools-libs-4.18.0-193.68.1.el8_2.aarch64.rpm perf-4.18.0-193.68.1.el8_2.aarch64.rpm perf-debuginfo-4.18.0-193.68.1.el8_2.aarch64.rpm python3-perf-4.18.0-193.68.1.el8_2.aarch64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:3904-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:3904
Issue date: 2021-10-19

Topic

An update for kernel 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 kernel update bug fix Red Hat Enterprise Linux virtualization KVM issue moderate vulnerability

Relevant Releases Architectures

Red Hat CodeReady Linux Builder EUS (v. 8.2) - aarch64, ppc64le, x86_64

Red Hat Enterprise Linux BaseOS EUS (v. 8.2) - aarch64, noarch, ppc64le, s390x, 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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