RedHat: RHSA-2020-3297:01 Important: kpatch-patch security update
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.
Summary
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
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
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/
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.
Topic
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.