RHSA-2021:4647: Important: kernel security update

Published Nov 15, 2021
·
Updated

The kernel packages contain the Linux kernel, the core of any Linux operating system.Security Fix(es): kernel: Insufficient validation of user-supplied sizes for the MSGCRYPTO message type (CVE-2021-43267) kernel: timer tree corruption leads to missing wakeup and system freeze (CVE-2021-20317) 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.

Affected Software

105 affected componentsFixes available
redhat/kernel<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/bpftool<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/bpftool-debuginfo<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-abi-stablelists<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-core<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-cross-headers<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-debug<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-debug-core<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-debug-debuginfo<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-debug-devel<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-debug-modules<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-debug-modules-extra<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-debuginfo<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-devel<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-doc<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-headers<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-modules<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-modules-extra<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-tools<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-tools-debuginfo<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-tools-libs<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/perf<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/perf-debuginfo<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/python3-perf<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/python3-perf-debuginfo<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/bpftool<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/bpftool-debuginfo<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-core<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-cross-headers<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-debug<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-debug-core<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-debug-debuginfo<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-debug-devel<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-debug-modules<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-debug-modules-extra<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-debuginfo<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-debuginfo-common-s390x<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-devel<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-headers<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-modules<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-modules-extra<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-tools<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-tools-debuginfo<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-zfcpdump<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-zfcpdump-core<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-zfcpdump-debuginfo<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-zfcpdump-devel<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-zfcpdump-modules<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-zfcpdump-modules-extra<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/perf<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/perf-debuginfo<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/python3-perf<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/python3-perf-debuginfo<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/bpftool<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/bpftool-debuginfo<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-core<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-cross-headers<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-debug<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-debug-core<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-debug-debuginfo<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-debug-devel<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-debug-modules<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-debug-modules-extra<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-debuginfo<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-debuginfo-common-ppc64le<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-devel<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-headers<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-modules<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-modules-extra<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-tools<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-tools-debuginfo<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-tools-libs<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/perf<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/perf-debuginfo<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/python3-perf<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/python3-perf-debuginfo<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/bpftool<4.18.0-348.2.1.el8_5.aa
4.18.0-348.2.1.el8_5.aa
redhat/bpftool-debuginfo<4.18.0-348.2.1.el8_5.aa
4.18.0-348.2.1.el8_5.aa
redhat/kernel<4.18.0-348.2.1.el8_5.aa
4.18.0-348.2.1.el8_5.aa
redhat/kernel-core<4.18.0-348.2.1.el8_5.aa
4.18.0-348.2.1.el8_5.aa
redhat/kernel-cross-headers<4.18.0-348.2.1.el8_5.aa
4.18.0-348.2.1.el8_5.aa
redhat/kernel-debug<4.18.0-348.2.1.el8_5.aa
4.18.0-348.2.1.el8_5.aa
redhat/kernel-debug-core<4.18.0-348.2.1.el8_5.aa
4.18.0-348.2.1.el8_5.aa
redhat/kernel-debug-debuginfo<4.18.0-348.2.1.el8_5.aa
4.18.0-348.2.1.el8_5.aa
redhat/kernel-debug-devel<4.18.0-348.2.1.el8_5.aa
4.18.0-348.2.1.el8_5.aa
redhat/kernel-debug-modules<4.18.0-348.2.1.el8_5.aa
4.18.0-348.2.1.el8_5.aa
redhat/kernel-debug-modules-extra<4.18.0-348.2.1.el8_5.aa
4.18.0-348.2.1.el8_5.aa
redhat/kernel-debuginfo<4.18.0-348.2.1.el8_5.aa
4.18.0-348.2.1.el8_5.aa
redhat/kernel-debuginfo-common-aarch64<4.18.0-348.2.1.el8_5.aa
4.18.0-348.2.1.el8_5.aa
redhat/kernel-devel<4.18.0-348.2.1.el8_5.aa
4.18.0-348.2.1.el8_5.aa
redhat/kernel-headers<4.18.0-348.2.1.el8_5.aa
4.18.0-348.2.1.el8_5.aa
redhat/kernel-modules<4.18.0-348.2.1.el8_5.aa
4.18.0-348.2.1.el8_5.aa
redhat/kernel-modules-extra<4.18.0-348.2.1.el8_5.aa
4.18.0-348.2.1.el8_5.aa
redhat/kernel-tools<4.18.0-348.2.1.el8_5.aa
4.18.0-348.2.1.el8_5.aa
redhat/kernel-tools-debuginfo<4.18.0-348.2.1.el8_5.aa
4.18.0-348.2.1.el8_5.aa
redhat/kernel-tools-libs<4.18.0-348.2.1.el8_5.aa
4.18.0-348.2.1.el8_5.aa
redhat/perf<4.18.0-348.2.1.el8_5.aa
4.18.0-348.2.1.el8_5.aa
redhat/perf-debuginfo<4.18.0-348.2.1.el8_5.aa
4.18.0-348.2.1.el8_5.aa
redhat/python3-perf<4.18.0-348.2.1.el8_5.aa
4.18.0-348.2.1.el8_5.aa
redhat/python3-perf-debuginfo<4.18.0-348.2.1.el8_5.aa
4.18.0-348.2.1.el8_5.aa
redhat/kernel-tools-libs-devel<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-tools-libs-devel<4.18.0-348.2.1.el8_5
4.18.0-348.2.1.el8_5
redhat/kernel-tools-libs-devel<4.18.0-348.2.1.el8_5.aa
4.18.0-348.2.1.el8_5.aa

Remediation

Event History

May 20, 2026
Advisory Published
via Red Hat·06:42 PM
Data Sourced
via Red Hat·06:42 PM
RemedyDescriptionAffected Software
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Frequently Asked Questions

1

What is the severity of RHSA-2021:4647?

The severity of RHSA-2021:4647 is classified as important due to multiple vulnerabilities in the Linux kernel.

2

How do I fix RHSA-2021:4647?

To fix RHSA-2021:4647, update the kernel packages to version 4.18.0-348.2.1.el8_5 or later.

3

What vulnerabilities are addressed in RHSA-2021:4647?

RHSA-2021:4647 addresses vulnerabilities including CVE-2021-43267 related to insufficient validation of user-supplied sizes.

4

Which systems are affected by RHSA-2021:4647?

RHSA-2021:4647 affects systems running the Linux kernel version prior to 4.18.0-348.2.1.el8_5.

5

What are the consequences of not addressing RHSA-2021:4647?

Not addressing RHSA-2021:4647 may leave systems vulnerable to exploitation and compromise.

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