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Red Hat Enterprise Linux 8 RHSA-2022:0849-01 Important Kpatch-Patch Update

red hat
Calendar Grey March 14, 2022
Dist Redhat Esm H88
An essential security patch for kpatch-patch on RHEL addresses multiple vulnerabilities related to privilege escalation and Denial of Service (DoS) threats.
An update for kpatch-patch 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: Use After Free in unix_gc() which could result in a local privilege escalation (CVE-2021-0920)
* kernel: local privilege escalation by exploiting the fsconfig syscall parameter leads to container breakout (CVE-2021-4154)
* kernel: possible privileges escalation due to missing TLB flush (CVE-2022-0330)
* kernel: remote stack overflow via kernel panic on systems using TIPC may lead to DoS (CVE-2022-0435)
* kernel: cgroups v1 release_agent feature may allow privilege escalation (CVE-2022-0492)
* kernel: failing usercopy allows for use-after-free exploitation (CVE-2022-22942)
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 DoS Red Hat Enterprise Linux important update kpatch-patch remote stack overflow

References

https://access.redhat.com/security/cve/CVE-2021-0920 https://access.redhat.com/security/cve/CVE-2021-4154 https://access.redhat.com/security/cve/CVE-2022-0330 https://access.redhat.com/security/cve/CVE-2022-0435 https://access.redhat.com/security/cve/CVE-2022-0492 https://access.redhat.com/security/cve/CVE-2022-22942 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux BaseOS (v. 8):
Source: kpatch-patch-4_18_0-348-1-3.el8.src.rpm kpatch-patch-4_18_0-348_12_2-1-1.el8_5.src.rpm kpatch-patch-4_18_0-348_2_1-1-2.el8_5.src.rpm kpatch-patch-4_18_0-348_7_1-1-2.el8_5.src.rpm
ppc64le: kpatch-patch-4_18_0-348-1-3.el8.ppc64le.rpm kpatch-patch-4_18_0-348-debuginfo-1-3.el8.ppc64le.rpm kpatch-patch-4_18_0-348-debugsource-1-3.el8.ppc64le.rpm kpatch-patch-4_18_0-348_12_2-1-1.el8_5.ppc64le.rpm kpatch-patch-4_18_0-348_12_2-debuginfo-1-1.el8_5.ppc64le.rpm kpatch-patch-4_18_0-348_12_2-debugsource-1-1.el8_5.ppc64le.rpm kpatch-patch-4_18_0-348_2_1-1-2.el8_5.ppc64le.rpm kpatch-patch-4_18_0-348_2_1-debuginfo-1-2.el8_5.ppc64le.rpm kpatch-patch-4_18_0-348_2_1-debugsource-1-2.el8_5.ppc64le.rpm kpatch-patch-4_18_0-348_7_1-1-2.el8_5.ppc64le.rpm kpatch-patch-4_18_0-348_7_1-debuginfo-1-2.el8_5.ppc64le.rpm kpatch-patch-4_18_0-348_7_1-debugsource-1-2.el8_5.ppc64le.rpm
x86_64: kpatch-patch-4_18_0-348-1-3.el8.x86_64.rpm kpatch-patch-4_18_0-348-debuginfo-1-3.el8.x86_64.rpm kpatch-patch-4_18_0-348-debugsource-1-3.el8.x86_64.rpm kpatch-patch-4_18_0-348_12_2-1-1.el8_5.x86_64.rpm kpatch-patch-4_18_0-348_12_2-debuginfo-1-1.el8_5.x86_64.rpm kpatch-patch-4_18_0-348_12_2-debugsource-1-1.el8_5.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2022:0849-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:0849
Issue date: 2022-03-14

Topic

An update for kpatch-patch 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 privilege escalation DoS Red Hat Enterprise Linux important update kpatch-patch remote stack overflow

Relevant Releases Architectures

Red Hat Enterprise Linux BaseOS (v. 8) - ppc64le, x86_64

Bugs Fixed

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

2034514 - CVE-2021-4154 kernel: local privilege escalation by exploiting the fsconfig syscall parameter leads to container breakout

2042404 - CVE-2022-0330 kernel: possible privileges escalation due to missing TLB flush

2044809 - CVE-2022-22942 kernel: failing usercopy allows for use-after-free exploitation

2048738 - CVE-2022-0435 kernel: remote stack overflow via kernel panic on systems using TIPC may lead to DoS

2051505 - CVE-2022-0492 kernel: cgroups v1 release_agent feature may allow privilege escalation

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