- Vulnerability/
- RHSA-2021:4646
RHSA-2021:4646: Important: kernel-rt security and bug fix update
First published: Mon Nov 15 2021(Updated: )
The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.<br>Security Fix(es):<br><li> kernel: Insufficient validation of user-supplied sizes for the MSG_CRYPTO message type (CVE-2021-43267)</li> <li> kernel: timer tree corruption leads to missing wakeup and system freeze (CVE-2021-20317)</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> kernel-rt: update RT source tree to the RHEL-8.5.z source tree (BZ#2020036)</li>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <4.18.0-348.2.1.rt7.132.el8_5 | 4.18.0-348.2.1.rt7.132.el8_5 |
| redhat/kernel-rt | <4.18.0-348.2.1.rt7.132.el8_5 | 4.18.0-348.2.1.rt7.132.el8_5 |
| redhat/kernel-rt-core | <4.18.0-348.2.1.rt7.132.el8_5 | 4.18.0-348.2.1.rt7.132.el8_5 |
| redhat/kernel-rt-debug | <4.18.0-348.2.1.rt7.132.el8_5 | 4.18.0-348.2.1.rt7.132.el8_5 |
| redhat/kernel-rt-debug-core | <4.18.0-348.2.1.rt7.132.el8_5 | 4.18.0-348.2.1.rt7.132.el8_5 |
| redhat/kernel-rt-debug-debuginfo | <4.18.0-348.2.1.rt7.132.el8_5 | 4.18.0-348.2.1.rt7.132.el8_5 |
| redhat/kernel-rt-debug-devel | <4.18.0-348.2.1.rt7.132.el8_5 | 4.18.0-348.2.1.rt7.132.el8_5 |
| redhat/kernel-rt-debug-modules | <4.18.0-348.2.1.rt7.132.el8_5 | 4.18.0-348.2.1.rt7.132.el8_5 |
| redhat/kernel-rt-debug-modules-extra | <4.18.0-348.2.1.rt7.132.el8_5 | 4.18.0-348.2.1.rt7.132.el8_5 |
| redhat/kernel-rt-debuginfo | <4.18.0-348.2.1.rt7.132.el8_5 | 4.18.0-348.2.1.rt7.132.el8_5 |
| redhat/kernel-rt-devel | <4.18.0-348.2.1.rt7.132.el8_5 | 4.18.0-348.2.1.rt7.132.el8_5 |
| redhat/kernel-rt-modules | <4.18.0-348.2.1.rt7.132.el8_5 | 4.18.0-348.2.1.rt7.132.el8_5 |
| redhat/kernel-rt-modules-extra | <4.18.0-348.2.1.rt7.132.el8_5 | 4.18.0-348.2.1.rt7.132.el8_5 |
| redhat/kernel-rt-debug-kvm | <4.18.0-348.2.1.rt7.132.el8_5 | 4.18.0-348.2.1.rt7.132.el8_5 |
| redhat/kernel-rt-kvm | <4.18.0-348.2.1.rt7.132.el8_5 | 4.18.0-348.2.1.rt7.132.el8_5 |
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Reference Links
Frequently Asked Questions
What is the severity of RHSA-2021:4646?
The severity of RHSA-2021:4646 is classified as important.
How do I fix RHSA-2021:4646?
To fix RHSA-2021:4646, you need to update to the kernel-rt packages version 4.18.0-348.2.1.rt7.132.el8_5 or later.
What vulnerabilities are addressed by RHSA-2021:4646?
RHSA-2021:4646 addresses the CVE-2021-43267 vulnerability, which involves insufficient validation of user-supplied sizes for the MSG_CRYPTO message type.
Which packages are affected by RHSA-2021:4646?
The affected packages under RHSA-2021:4646 include kernel-rt, kernel-rt-core, and various debug and development packages.
When was RHSA-2021:4646 released?
RHSA-2021:4646 was released on December 15, 2021.
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