What is the severity of RHSA-2021:4875?

The severity of RHSA-2021:4875 is classified as important.

How do I fix RHSA-2021:4875?

To fix RHSA-2021:4875, update the kernel-rt packages to version 4.18.0-193.70.1.rt13.120.el8_2.

What vulnerabilities are addressed in RHSA-2021:4875?

RHSA-2021:4875 addresses a use-after-free vulnerability in drivers/infiniband/core/ucma.c (CVE-2020-36385).

Which packages are affected by RHSA-2021:4875?

The affected packages include kernel-rt and its variants such as kernel-rt-core, kernel-rt-debug, and kernel-rt-modules.

Is a reboot required after applying the fix for RHSA-2021:4875?

Yes, a reboot is required after updating the kernel-rt packages to ensure the changes take effect.

Vulnerability/
RHSA-2021:4875

CWE

416

30/11/2021

RHSA-2021:4875: Important: kernel-rt security and bug fix update

First published: Tue Nov 30 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: use-after-free in drivers/infiniband/core/ucma.c ctx use-after-free (CVE-2020-36385)</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 latest RHEL-8.2.z13 Batch source tree (BZ#2020969)</li>

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Reference Links

Frequently Asked Questions

What is the severity of RHSA-2021:4875?
The severity of RHSA-2021:4875 is classified as important.
How do I fix RHSA-2021:4875?
To fix RHSA-2021:4875, update the kernel-rt packages to version 4.18.0-193.70.1.rt13.120.el8_2.
What vulnerabilities are addressed in RHSA-2021:4875?
RHSA-2021:4875 addresses a use-after-free vulnerability in drivers/infiniband/core/ucma.c (CVE-2020-36385).
Which packages are affected by RHSA-2021:4875?
The affected packages include kernel-rt and its variants such as kernel-rt-core, kernel-rt-debug, and kernel-rt-modules.
Is a reboot required after applying the fix for RHSA-2021:4875?
Yes, a reboot is required after updating the kernel-rt packages to ensure the changes take effect.

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