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Important Kernel Live Patch Vulnerability in Red Hat Enterprise Linux 8.2

red hat
Calendar Grey February 22, 2022
Dist Redhat Esm H88
Urgent kpatch-patch security enhancement for CentOS Linux addressing vulnerabilities in access control and information exposure.
An update is now available for Red Hat Enterprise Linux 8.2 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: Use After Free in unix_gc() which could result in a local privilege escalation (CVE-2021-0920)
* kernel: use-after-free in RDMA listen() (CVE-2021-4028)
* kernel: xfs: raw block device data leak in XFS_IOC_ALLOCSP IOCTL (CVE-2021-4155)
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 privilege escalation kernel patch Red Hat Enterprise Linux important data leak

References

https://access.redhat.com/security/cve/CVE-2021-0920 https://access.redhat.com/security/cve/CVE-2021-4028 https://access.redhat.com/security/cve/CVE-2021-4155 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux BaseOS EUS (v. 8.2):
Source: kpatch-patch-4_18_0-193_46_1-1-9.el8_2.src.rpm kpatch-patch-4_18_0-193_47_1-1-9.el8_2.src.rpm kpatch-patch-4_18_0-193_51_1-1-6.el8_2.src.rpm kpatch-patch-4_18_0-193_56_1-1-5.el8_2.src.rpm kpatch-patch-4_18_0-193_60_2-1-4.el8_2.src.rpm kpatch-patch-4_18_0-193_64_1-1-3.el8_2.src.rpm kpatch-patch-4_18_0-193_65_2-1-2.el8_2.src.rpm kpatch-patch-4_18_0-193_68_1-1-2.el8_2.src.rpm kpatch-patch-4_18_0-193_70_1-1-1.el8_2.src.rpm kpatch-patch-4_18_0-193_71_1-1-1.el8_2.src.rpm
ppc64le: kpatch-patch-4_18_0-193_46_1-1-9.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_46_1-debuginfo-1-9.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_46_1-debugsource-1-9.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_47_1-1-9.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_47_1-debuginfo-1-9.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_47_1-debugsource-1-9.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_51_1-1-6.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_51_1-debuginfo-1-6.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_51_1-debugsource-1-6.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_56_1-1-5.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_56_1-debuginfo-1-5.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_56_1-debugsource-1-5.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_60_2-1-4.el8_2.ppc64le.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2022:0590-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:0590
Issue date: 2022-02-22

Topic

An update is now available for Red Hat Enterprise Linux 8.2 Extended UpdateSupport.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 privilege escalation kernel patch Red Hat Enterprise Linux important data leak

Relevant Releases Architectures

Red Hat Enterprise Linux BaseOS EUS (v. 8.2) - ppc64le, x86_64

Bugs Fixed

2027201 - CVE-2021-4028 kernel: use-after-free in RDMA listen()

2031930 - CVE-2021-0920 kernel: Use After Free in unix_gc() which could result in a local privilege escalation

2034813 - CVE-2021-4155 kernel: xfs: raw block device data leak in XFS_IOC_ALLOCSP IOCTL

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