RHSA-2022:1555: Important: kernel-rt security and bug fix update
First published: Tue Apr 26 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: use-after-free in RDMA listen() (CVE-2021-4028)</li> <li> kernel: heap out of bounds write in nf_dup_netdev.c (CVE-2022-25636)</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.z4 source tree (BZ#2067266)</li>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <4.18.0-348.23.1.rt7.153.el8_5 | 4.18.0-348.23.1.rt7.153.el8_5 |
| redhat/kernel-rt | <4.18.0-348.23.1.rt7.153.el8_5 | 4.18.0-348.23.1.rt7.153.el8_5 |
| redhat/kernel-rt-core | <4.18.0-348.23.1.rt7.153.el8_5 | 4.18.0-348.23.1.rt7.153.el8_5 |
| redhat/kernel-rt-debug | <4.18.0-348.23.1.rt7.153.el8_5 | 4.18.0-348.23.1.rt7.153.el8_5 |
| redhat/kernel-rt-debug-core | <4.18.0-348.23.1.rt7.153.el8_5 | 4.18.0-348.23.1.rt7.153.el8_5 |
| redhat/kernel-rt-debug-debuginfo | <4.18.0-348.23.1.rt7.153.el8_5 | 4.18.0-348.23.1.rt7.153.el8_5 |
| redhat/kernel-rt-debug-devel | <4.18.0-348.23.1.rt7.153.el8_5 | 4.18.0-348.23.1.rt7.153.el8_5 |
| redhat/kernel-rt-debug-modules | <4.18.0-348.23.1.rt7.153.el8_5 | 4.18.0-348.23.1.rt7.153.el8_5 |
| redhat/kernel-rt-debug-modules-extra | <4.18.0-348.23.1.rt7.153.el8_5 | 4.18.0-348.23.1.rt7.153.el8_5 |
| redhat/kernel-rt-debuginfo | <4.18.0-348.23.1.rt7.153.el8_5 | 4.18.0-348.23.1.rt7.153.el8_5 |
| redhat/kernel-rt-devel | <4.18.0-348.23.1.rt7.153.el8_5 | 4.18.0-348.23.1.rt7.153.el8_5 |
| redhat/kernel-rt-modules | <4.18.0-348.23.1.rt7.153.el8_5 | 4.18.0-348.23.1.rt7.153.el8_5 |
| redhat/kernel-rt-modules-extra | <4.18.0-348.23.1.rt7.153.el8_5 | 4.18.0-348.23.1.rt7.153.el8_5 |
| redhat/kernel-rt-debug-kvm | <4.18.0-348.23.1.rt7.153.el8_5 | 4.18.0-348.23.1.rt7.153.el8_5 |
| redhat/kernel-rt-kvm | <4.18.0-348.23.1.rt7.153.el8_5 | 4.18.0-348.23.1.rt7.153.el8_5 |
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Reference Links
Frequently Asked Questions
What is the severity of RHSA-2022:1555?
The severity of RHSA-2022:1555 is categorized as critical due to the potential for exploitation in the kernel.
How do I fix RHSA-2022:1555?
To fix RHSA-2022:1555, update to the kernel-rt packages version 4.18.0-348.23.1.rt7.153.el8_5 or later.
What vulnerabilities are addressed in RHSA-2022:1555?
RHSA-2022:1555 addresses a use-after-free vulnerability in RDMA listen() (CVE-2021-4028) and a heap out-of-bounds write issue.
Which software packages are affected by RHSA-2022:1555?
Affected packages include kernel-rt, kernel-rt-core, and kernel-rt-debug among others, all needing the update to version 4.18.0-348.23.1.rt7.153.el8_5.
Is a reboot required after applying the fix for RHSA-2022:1555?
Yes, a reboot is typically required for changes to the kernel to take effect after applying the fix for RHSA-2022:1555.
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