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Red Hat Enterprise Linux: RHSA-2022-1103-01 Critical: kpatch-patch Fix

red hat
Calendar Grey March 29, 2022
Dist Redhat Esm H88
Ubuntu issues critical kernel updates in 20.04 LTS to rectify vulnerabilities in system architecture, affecting overall stability.
An update for kpatch-patch is now available for Red Hat Enterprise Linux 7

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: fget: check that the fd still exists after getting a ref to it (CVE-2021-4083)
* kernel: possible privileges escalation due to missing TLB flush (CVE-2022-0330)
* 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 security fix kernel red hat enterprise linux important update kpatch-patch

References

https://access.redhat.com/security/cve/CVE-2021-0920 https://access.redhat.com/security/cve/CVE-2021-4083 https://access.redhat.com/security/cve/CVE-2022-0330 https://access.redhat.com/security/cve/CVE-2022-22942 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Server E4S (v. 7.6):
Source: kpatch-patch-3_10_0-957_72_1-1-6.el7.src.rpm kpatch-patch-3_10_0-957_76_1-1-6.el7.src.rpm kpatch-patch-3_10_0-957_78_2-1-5.el7.src.rpm kpatch-patch-3_10_0-957_80_1-1-4.el7.src.rpm kpatch-patch-3_10_0-957_84_1-1-3.el7.src.rpm kpatch-patch-3_10_0-957_86_1-1-2.el7.src.rpm kpatch-patch-3_10_0-957_88_1-1-1.el7.src.rpm
ppc64le: kpatch-patch-3_10_0-957_72_1-1-6.el7.ppc64le.rpm kpatch-patch-3_10_0-957_72_1-debuginfo-1-6.el7.ppc64le.rpm kpatch-patch-3_10_0-957_76_1-1-6.el7.ppc64le.rpm kpatch-patch-3_10_0-957_76_1-debuginfo-1-6.el7.ppc64le.rpm kpatch-patch-3_10_0-957_78_2-1-5.el7.ppc64le.rpm kpatch-patch-3_10_0-957_78_2-debuginfo-1-5.el7.ppc64le.rpm kpatch-patch-3_10_0-957_80_1-1-4.el7.ppc64le.rpm kpatch-patch-3_10_0-957_80_1-debuginfo-1-4.el7.ppc64le.rpm kpatch-patch-3_10_0-957_84_1-1-3.el7.ppc64le.rpm kpatch-patch-3_10_0-957_84_1-debuginfo-1-3.el7.ppc64le.rpm kpatch-patch-3_10_0-957_86_1-1-2.el7.ppc64le.rpm kpatch-patch-3_10_0-957_86_1-debuginfo-1-2.el7.ppc64le.rpm kpatch-patch-3_10_0-957_88_1-1-1.el7.ppc64le.rpm kpatch-patch-3_10_0-957_88_1-debuginfo-1-1.el7.ppc64le.rpm
x86_64: kpatch-patch-3_10_0-957_72_1-1-6.el7.x86_64.rpm kpatch-patch-3_10_0-957_72_1-debuginfo-1-6.el7.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2022:1103-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:1103
Issue date: 2022-03-29

Topic

An update for kpatch-patch is now available for Red Hat Enterprise Linux 7.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 security fix kernel red hat enterprise linux important update kpatch-patch

Relevant Releases Architectures

Red Hat Enterprise Linux Server E4S (v. 7.6) - ppc64le, x86_64

Bugs Fixed

2029923 - CVE-2021-4083 kernel: fget: check that the fd still exists after getting a ref to it

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

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

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