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Red Hat Enterprise Linux 8.1 RHSA-2020:3297-01 Critical Kpatch Update

red hat
Calendar Grey August 4, 2020
Dist Redhat Esm H88
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ====================================================
An update for kpatch-patch is now available for Red Hat Enterprise Linux 8.1 Extended Update Support

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: Rogue cross-process SSBD shutdown. Linux scheduler logical bug allows an attacker to turn off the SSBD protection. (CVE-2020-10766)
* kernel: Indirect Branch Prediction Barrier is force-disabled when STIBP is unavailable or enhanced IBRS is available. (CVE-2020-10767)
* kernel: Indirect branch speculation can be enabled after it was force-disabled by the PR_SPEC_FORCE_DISABLE prctl command. (CVE-2020-10768)
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 Red Hat Enterprise Linux critical threat security impact kpatch-patch

References

https://access.redhat.com/security/cve/CVE-2020-10766 https://access.redhat.com/security/cve/CVE-2020-10767 https://access.redhat.com/security/cve/CVE-2020-10768 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux BaseOS EUS (v. 8.1):
Source: kpatch-patch-4_18_0-147-1-16.el8.src.rpm kpatch-patch-4_18_0-147_0_2-1-12.el8.src.rpm kpatch-patch-4_18_0-147_0_3-1-12.el8.src.rpm kpatch-patch-4_18_0-147_13_2-1-3.el8_1.src.rpm kpatch-patch-4_18_0-147_20_1-1-2.el8_1.src.rpm kpatch-patch-4_18_0-147_3_1-1-12.el8_1.src.rpm kpatch-patch-4_18_0-147_5_1-1-7.el8_1.src.rpm kpatch-patch-4_18_0-147_8_1-1-5.el8_1.src.rpm
x86_64: kpatch-patch-4_18_0-147-1-16.el8.x86_64.rpm kpatch-patch-4_18_0-147-debuginfo-1-16.el8.x86_64.rpm kpatch-patch-4_18_0-147-debugsource-1-16.el8.x86_64.rpm kpatch-patch-4_18_0-147_0_2-1-12.el8.x86_64.rpm kpatch-patch-4_18_0-147_0_2-debuginfo-1-12.el8.x86_64.rpm kpatch-patch-4_18_0-147_0_2-debugsource-1-12.el8.x86_64.rpm kpatch-patch-4_18_0-147_0_3-1-12.el8.x86_64.rpm kpatch-patch-4_18_0-147_13_2-1-3.el8_1.x86_64.rpm kpatch-patch-4_18_0-147_13_2-debuginfo-1-3.el8_1.x86_64.rpm kpatch-patch-4_18_0-147_13_2-debugsource-1-3.el8_1.x86_64.rpm kpatch-patch-4_18_0-147_20_1-1-2.el8_1.x86_64.rpm kpatch-patch-4_18_0-147_20_1-debuginfo-1-2.el8_1.x86_64.rpm kpatch-patch-4_18_0-147_20_1-debugsource-1-2.el8_1.x86_64.rpm kpatch-patch-4_18_0-147_3_1-1-12.el8_1.x86_64.rpm kpatch-patch-4_18_0-147_5_1-1-7.el8_1.x86_64.rpm kpatch-patch-4_18_0-147_8_1-1-5.el8_1.x86_64.rpm


Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2020:3297-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:3297
Issue date: 2020-08-04

Topic

An update for kpatch-patch is now available for Red Hat Enterprise Linux8.1 Extended Update Support.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 Red Hat Enterprise Linux critical threat security impact kpatch-patch

Relevant Releases Architectures

Red Hat Enterprise Linux BaseOS EUS (v. 8.1) - x86_64

Bugs Fixed

1845840 - CVE-2020-10766 kernel: Rogue cross-process SSBD shutdown. Linux scheduler logical bug allows an attacker to turn off the SSBD protection.

1845867 - CVE-2020-10767 kernel: Indirect Branch Prediction Barrier is force-disabled when STIBP is unavailable or enhanced IBRS is available.

1845868 - CVE-2020-10768 kernel: Indirect branch speculation can be enabled after it was force-disabled by the PR_SPEC_FORCE_DISABLE prctl command.

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