What is the severity of RHSA-2021:4971?

RHSA-2021:4971 is classified as important due to a use-after-free vulnerability in the kernel.

How do I fix RHSA-2021:4971?

To fix RHSA-2021:4971, you need to update your kpatch-patch to one of the affected versions provided in the advisory.

What systems are affected by RHSA-2021:4971?

RHSA-2021:4971 affects systems running specific versions of the Red Hat kpatch-patch for kernel live patching.

What does the CVE-2020-36385 vulnerability in RHSA-2021:4971 refer to?

CVE-2020-36385 refers to a use-after-free vulnerability found in the drivers/infiniband/core/ucma.c file.

Will RHSA-2021:4971 require a reboot after applying the fix?

Generally, applying the fix for RHSA-2021:4971 may not require a reboot as it is related to kernel live patching.

Vulnerability/
RHSA-2021:4971

CWE

416

7/12/2021

RHSA-2021:4971: Important: kpatch-patch security update

First published: Tue Dec 07 2021(Updated: )

This is a kernel live patch module which is automatically loaded by the RPM post-install script to modify the code of a running kernel.<br>Security Fix(es):<br><li> kernel: use-after-free in drivers/infiniband/core/ucma.c ctx use-after-free (CVE-2020-36385)</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.

Affected Software	Affected Version	How to fix
redhat/kpatch-patch	<3_10_0-1062_43_1-1-7.el7	3_10_0-1062_43_1-1-7.el7
redhat/kpatch-patch	<3_10_0-1062_45_1-1-7.el7	3_10_0-1062_45_1-1-7.el7
redhat/kpatch-patch	<3_10_0-1062_46_1-1-6.el7	3_10_0-1062_46_1-1-6.el7
redhat/kpatch-patch	<3_10_0-1062_49_1-1-4.el7	3_10_0-1062_49_1-1-4.el7
redhat/kpatch-patch	<3_10_0-1062_51_1-1-4.el7	3_10_0-1062_51_1-1-4.el7
redhat/kpatch-patch	<3_10_0-1062_52_2-1-3.el7	3_10_0-1062_52_2-1-3.el7
redhat/kpatch-patch	<3_10_0-1062_56_1-1-2.el7	3_10_0-1062_56_1-1-2.el7
redhat/kpatch-patch	<3_10_0-1062_43_1-1-7.el7	3_10_0-1062_43_1-1-7.el7
redhat/kpatch-patch	<3_10_0-1062_43_1-debuginfo-1-7.el7	3_10_0-1062_43_1-debuginfo-1-7.el7
redhat/kpatch-patch	<3_10_0-1062_45_1-1-7.el7	3_10_0-1062_45_1-1-7.el7
redhat/kpatch-patch	<3_10_0-1062_45_1-debuginfo-1-7.el7	3_10_0-1062_45_1-debuginfo-1-7.el7
redhat/kpatch-patch	<3_10_0-1062_46_1-1-6.el7	3_10_0-1062_46_1-1-6.el7
redhat/kpatch-patch	<3_10_0-1062_46_1-debuginfo-1-6.el7	3_10_0-1062_46_1-debuginfo-1-6.el7
redhat/kpatch-patch	<3_10_0-1062_49_1-1-4.el7	3_10_0-1062_49_1-1-4.el7
redhat/kpatch-patch	<3_10_0-1062_49_1-debuginfo-1-4.el7	3_10_0-1062_49_1-debuginfo-1-4.el7
redhat/kpatch-patch	<3_10_0-1062_51_1-1-4.el7	3_10_0-1062_51_1-1-4.el7
redhat/kpatch-patch	<3_10_0-1062_51_1-debuginfo-1-4.el7	3_10_0-1062_51_1-debuginfo-1-4.el7
redhat/kpatch-patch	<3_10_0-1062_52_2-1-3.el7	3_10_0-1062_52_2-1-3.el7
redhat/kpatch-patch	<3_10_0-1062_52_2-debuginfo-1-3.el7	3_10_0-1062_52_2-debuginfo-1-3.el7
redhat/kpatch-patch	<3_10_0-1062_56_1-1-2.el7	3_10_0-1062_56_1-1-2.el7
redhat/kpatch-patch	<3_10_0-1062_56_1-debuginfo-1-2.el7	3_10_0-1062_56_1-debuginfo-1-2.el7
redhat/kpatch-patch	<3_10_0-1062_43_1-1-7.el7	3_10_0-1062_43_1-1-7.el7
redhat/kpatch-patch	<3_10_0-1062_43_1-debuginfo-1-7.el7	3_10_0-1062_43_1-debuginfo-1-7.el7
redhat/kpatch-patch	<3_10_0-1062_45_1-1-7.el7	3_10_0-1062_45_1-1-7.el7
redhat/kpatch-patch	<3_10_0-1062_45_1-debuginfo-1-7.el7	3_10_0-1062_45_1-debuginfo-1-7.el7
redhat/kpatch-patch	<3_10_0-1062_46_1-1-6.el7	3_10_0-1062_46_1-1-6.el7
redhat/kpatch-patch	<3_10_0-1062_46_1-debuginfo-1-6.el7	3_10_0-1062_46_1-debuginfo-1-6.el7
redhat/kpatch-patch	<3_10_0-1062_49_1-1-4.el7	3_10_0-1062_49_1-1-4.el7
redhat/kpatch-patch	<3_10_0-1062_49_1-debuginfo-1-4.el7	3_10_0-1062_49_1-debuginfo-1-4.el7
redhat/kpatch-patch	<3_10_0-1062_51_1-1-4.el7	3_10_0-1062_51_1-1-4.el7
redhat/kpatch-patch	<3_10_0-1062_51_1-debuginfo-1-4.el7	3_10_0-1062_51_1-debuginfo-1-4.el7
redhat/kpatch-patch	<3_10_0-1062_52_2-1-3.el7	3_10_0-1062_52_2-1-3.el7
redhat/kpatch-patch	<3_10_0-1062_52_2-debuginfo-1-3.el7	3_10_0-1062_52_2-debuginfo-1-3.el7
redhat/kpatch-patch	<3_10_0-1062_56_1-1-2.el7	3_10_0-1062_56_1-1-2.el7
redhat/kpatch-patch	<3_10_0-1062_56_1-debuginfo-1-2.el7	3_10_0-1062_56_1-debuginfo-1-2.el7

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Reference Links

Frequently Asked Questions

What is the severity of RHSA-2021:4971?
RHSA-2021:4971 is classified as important due to a use-after-free vulnerability in the kernel.
How do I fix RHSA-2021:4971?
To fix RHSA-2021:4971, you need to update your kpatch-patch to one of the affected versions provided in the advisory.
What systems are affected by RHSA-2021:4971?
RHSA-2021:4971 affects systems running specific versions of the Red Hat kpatch-patch for kernel live patching.
What does the CVE-2020-36385 vulnerability in RHSA-2021:4971 refer to?
CVE-2020-36385 refers to a use-after-free vulnerability found in the drivers/infiniband/core/ucma.c file.
Will RHSA-2021:4971 require a reboot after applying the fix?
Generally, applying the fix for RHSA-2021:4971 may not require a reboot as it is related to kernel live patching.

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