RHSA-2022:4835: Important: kernel-rt security and bug fix update
First published: Tue May 31 2022(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: new DNS Cache Poisoning Attack based on ICMP fragment needed packets replies (CVE-2021-20322)</li> <li> kernel: security regression for CVE-2018-13405 (CVE-2021-4037)</li> <li> kernel: buffer overflow in IPsec ESP transformation code (CVE-2022-27666)</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-8.4.z9 source tree (BZ#2075148)</li>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <4.18.0-305.49.1.rt7.121.el8_4 | 4.18.0-305.49.1.rt7.121.el8_4 |
| redhat/kernel-rt | <4.18.0-305.49.1.rt7.121.el8_4 | 4.18.0-305.49.1.rt7.121.el8_4 |
| redhat/kernel-rt-core | <4.18.0-305.49.1.rt7.121.el8_4 | 4.18.0-305.49.1.rt7.121.el8_4 |
| redhat/kernel-rt-debug | <4.18.0-305.49.1.rt7.121.el8_4 | 4.18.0-305.49.1.rt7.121.el8_4 |
| redhat/kernel-rt-debug-core | <4.18.0-305.49.1.rt7.121.el8_4 | 4.18.0-305.49.1.rt7.121.el8_4 |
| redhat/kernel-rt-debug-debuginfo | <4.18.0-305.49.1.rt7.121.el8_4 | 4.18.0-305.49.1.rt7.121.el8_4 |
| redhat/kernel-rt-debug-devel | <4.18.0-305.49.1.rt7.121.el8_4 | 4.18.0-305.49.1.rt7.121.el8_4 |
| redhat/kernel-rt-debug-modules | <4.18.0-305.49.1.rt7.121.el8_4 | 4.18.0-305.49.1.rt7.121.el8_4 |
| redhat/kernel-rt-debug-modules-extra | <4.18.0-305.49.1.rt7.121.el8_4 | 4.18.0-305.49.1.rt7.121.el8_4 |
| redhat/kernel-rt-debuginfo | <4.18.0-305.49.1.rt7.121.el8_4 | 4.18.0-305.49.1.rt7.121.el8_4 |
| redhat/kernel-rt-devel | <4.18.0-305.49.1.rt7.121.el8_4 | 4.18.0-305.49.1.rt7.121.el8_4 |
| redhat/kernel-rt-modules | <4.18.0-305.49.1.rt7.121.el8_4 | 4.18.0-305.49.1.rt7.121.el8_4 |
| redhat/kernel-rt-modules-extra | <4.18.0-305.49.1.rt7.121.el8_4 | 4.18.0-305.49.1.rt7.121.el8_4 |
| redhat/kernel-rt-debug-kvm | <4.18.0-305.49.1.rt7.121.el8_4 | 4.18.0-305.49.1.rt7.121.el8_4 |
| redhat/kernel-rt-kvm | <4.18.0-305.49.1.rt7.121.el8_4 | 4.18.0-305.49.1.rt7.121.el8_4 |
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Reference Links
Frequently Asked Questions
What vulnerabilities are addressed by RHSA-2022:4835?
RHSA-2022:4835 addresses a DNS Cache Poisoning Attack based on ICMP fragment needed packets replies (CVE-2021-20322).
What is the recommended remediation for RHSA-2022:4835?
The recommended remediation for RHSA-2022:4835 is to upgrade to kernel-rt version 4.18.0-305.49.1.rt7.121.el8_4.
Which Red Hat packages are affected by RHSA-2022:4835?
RHSA-2022:4835 affects several Red Hat packages including kernel-rt, kernel-rt-core, and kernel-rt-debug, among others.
What platforms are impacted by the vulnerabilities in RHSA-2022:4835?
The vulnerabilities in RHSA-2022:4835 impact systems running the Real Time Linux Kernel for Red Hat Enterprise Linux 8.4.
How can I verify if my system is vulnerable to RHSA-2022:4835?
You can verify your system's vulnerability to RHSA-2022:4835 by checking the installed versions of the affected kernel-rt packages against the fixed version.
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