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Red Hat Enterprise Linux 8 RHSA-2021-3436-01 Important: Kpatch Memory Fix

red hat
Calendar Grey September 7, 2021
Scroller Redhat
A significant security enhancement for Red Hat Enterprise Linux 8 tackles potential memory corruption vulnerabilities associated with kpatch-patch updates.
An update is now available for Red Hat Enterprise Linux 8

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Summary

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.
Security Fix(es):
* kernel: powerpc: KVM guest OS users can cause host OS memory corruption (CVE-2021-37576)
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.

Topics%20covered

Topics Covered

security advisory memory corruption important red hat enterprise linux kpatch patch

References

https://access.redhat.com/security/cve/CVE-2021-37576 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux BaseOS (v. 8):
Source: kpatch-patch-4_18_0-305-1-5.el8.src.rpm kpatch-patch-4_18_0-305_10_2-1-2.el8_4.src.rpm kpatch-patch-4_18_0-305_12_1-1-1.el8_4.src.rpm kpatch-patch-4_18_0-305_3_1-1-4.el8_4.src.rpm kpatch-patch-4_18_0-305_7_1-1-3.el8_4.src.rpm
ppc64le: kpatch-patch-4_18_0-305-1-5.el8.ppc64le.rpm kpatch-patch-4_18_0-305-debuginfo-1-5.el8.ppc64le.rpm kpatch-patch-4_18_0-305-debugsource-1-5.el8.ppc64le.rpm kpatch-patch-4_18_0-305_10_2-1-2.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_10_2-debuginfo-1-2.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_10_2-debugsource-1-2.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_12_1-1-1.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_12_1-debuginfo-1-1.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_12_1-debugsource-1-1.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_3_1-1-4.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_3_1-debuginfo-1-4.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_3_1-debugsource-1-4.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_7_1-1-3.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_7_1-debuginfo-1-3.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_7_1-debugsource-1-3.el8_4.ppc64le.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:3436-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:3436
Issue date: 2021-09-07

Topic

An update is now available for Red Hat Enterprise Linux 8.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory memory corruption important red hat enterprise linux kpatch patch

Relevant Releases Architectures

Red Hat Enterprise Linux BaseOS (v. 8) - ppc64le

Bugs Fixed

1986506 - CVE-2021-37576 kernel: powerpc: KVM guest OS users can cause host OS memory corruption

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