RHSA-2021:2666: Important: kernel security and bug fix update

Published Jul 7, 2021
·
Updated

The kernel packages contain the Linux kernel, the core of any Linux operating system.<br>Security Fix(es):<br><li> kernel: use-after-free in net/bluetooth/hcievent.c when destroying an hcichan (CVE-2021-33034)</li> <li> kernel: security bypass in certs/blacklist.c and certs/systemkeyring.c (CVE-2020-26541)</li> 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.<br>Bug Fix(es):<br><li> [Azure][RHEL8.4] Two Patches Needed To Enable Azure Host Time-syncing in VMs (BZ#1963052)</li>

Affected Software

105 affected componentsFixes available
redhat/kernel<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/bpftool<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/bpftool-debuginfo<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-abi-whitelists<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-core<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-cross-headers<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-debug<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-debug-core<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-debug-debuginfo<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-debug-devel<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-debug-modules<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-debug-modules-extra<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-debuginfo<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-devel<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-doc<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-headers<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-modules<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-modules-extra<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-tools<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-tools-debuginfo<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-tools-libs<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/perf<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/perf-debuginfo<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/python3-perf<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/python3-perf-debuginfo<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/bpftool<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/bpftool-debuginfo<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-core<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-cross-headers<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-debug<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-debug-core<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-debug-debuginfo<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-debug-devel<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-debug-modules<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-debug-modules-extra<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-debuginfo<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-debuginfo-common-s390x<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-devel<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-headers<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-modules<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-modules-extra<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-tools<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-tools-debuginfo<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-zfcpdump<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-zfcpdump-core<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-zfcpdump-debuginfo<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-zfcpdump-devel<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-zfcpdump-modules<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-zfcpdump-modules-extra<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/perf<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/perf-debuginfo<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/python3-perf<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/python3-perf-debuginfo<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/bpftool<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/bpftool-debuginfo<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-core<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-cross-headers<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-debug<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-debug-core<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-debug-debuginfo<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-debug-devel<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-debug-modules<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-debug-modules-extra<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-debuginfo<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-debuginfo-common-ppc64le<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-devel<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-headers<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-modules<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-modules-extra<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-tools<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-tools-debuginfo<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-tools-libs<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/perf<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/perf-debuginfo<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/python3-perf<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/python3-perf-debuginfo<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/bpftool<4.18.0-147.51.1.el8_1.aa
4.18.0-147.51.1.el8_1.aa
redhat/bpftool-debuginfo<4.18.0-147.51.1.el8_1.aa
4.18.0-147.51.1.el8_1.aa
redhat/kernel<4.18.0-147.51.1.el8_1.aa
4.18.0-147.51.1.el8_1.aa
redhat/kernel-core<4.18.0-147.51.1.el8_1.aa
4.18.0-147.51.1.el8_1.aa
redhat/kernel-cross-headers<4.18.0-147.51.1.el8_1.aa
4.18.0-147.51.1.el8_1.aa
redhat/kernel-debug<4.18.0-147.51.1.el8_1.aa
4.18.0-147.51.1.el8_1.aa
redhat/kernel-debug-core<4.18.0-147.51.1.el8_1.aa
4.18.0-147.51.1.el8_1.aa
redhat/kernel-debug-debuginfo<4.18.0-147.51.1.el8_1.aa
4.18.0-147.51.1.el8_1.aa
redhat/kernel-debug-devel<4.18.0-147.51.1.el8_1.aa
4.18.0-147.51.1.el8_1.aa
redhat/kernel-debug-modules<4.18.0-147.51.1.el8_1.aa
4.18.0-147.51.1.el8_1.aa
redhat/kernel-debug-modules-extra<4.18.0-147.51.1.el8_1.aa
4.18.0-147.51.1.el8_1.aa
redhat/kernel-debuginfo<4.18.0-147.51.1.el8_1.aa
4.18.0-147.51.1.el8_1.aa
redhat/kernel-debuginfo-common-aarch64<4.18.0-147.51.1.el8_1.aa
4.18.0-147.51.1.el8_1.aa
redhat/kernel-devel<4.18.0-147.51.1.el8_1.aa
4.18.0-147.51.1.el8_1.aa
redhat/kernel-headers<4.18.0-147.51.1.el8_1.aa
4.18.0-147.51.1.el8_1.aa
redhat/kernel-modules<4.18.0-147.51.1.el8_1.aa
4.18.0-147.51.1.el8_1.aa
redhat/kernel-modules-extra<4.18.0-147.51.1.el8_1.aa
4.18.0-147.51.1.el8_1.aa
redhat/kernel-tools<4.18.0-147.51.1.el8_1.aa
4.18.0-147.51.1.el8_1.aa
redhat/kernel-tools-debuginfo<4.18.0-147.51.1.el8_1.aa
4.18.0-147.51.1.el8_1.aa
redhat/kernel-tools-libs<4.18.0-147.51.1.el8_1.aa
4.18.0-147.51.1.el8_1.aa
redhat/perf<4.18.0-147.51.1.el8_1.aa
4.18.0-147.51.1.el8_1.aa
redhat/perf-debuginfo<4.18.0-147.51.1.el8_1.aa
4.18.0-147.51.1.el8_1.aa
redhat/python3-perf<4.18.0-147.51.1.el8_1.aa
4.18.0-147.51.1.el8_1.aa
redhat/python3-perf-debuginfo<4.18.0-147.51.1.el8_1.aa
4.18.0-147.51.1.el8_1.aa
redhat/kernel-tools-libs-devel<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-tools-libs-devel<4.18.0-147.51.1.el8_1
4.18.0-147.51.1.el8_1
redhat/kernel-tools-libs-devel<4.18.0-147.51.1.el8_1.aa
4.18.0-147.51.1.el8_1.aa

Remediation

Event History

Jan 22, 2025
Advisory Published
via Red Hat·02:53 AM
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Frequently Asked Questions

1

What is the severity of RHSA-2021:2666?

The severity of RHSA-2021:2666 is classified as important.

2

How do I fix RHSA-2021:2666?

To fix RHSA-2021:2666, update the kernel packages to version 4.18.0-147.51.1.el8_1.

3

What vulnerabilities are addressed in RHSA-2021:2666?

RHSA-2021:2666 addresses a use-after-free vulnerability in the Bluetooth subsystem (CVE-2021-33034) and a security bypass related to the kernel authentication process.

4

Which systems are affected by RHSA-2021:2666?

RHSA-2021:2666 affects systems using the kernel version prior to 4.18.0-147.51.1.el8_1.

5

Is there a workaround for RHSA-2021:2666?

No specific workaround is provided for RHSA-2021:2666; updating to the fixed version is recommended.

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