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Red Hat Enterprise Linux 8.1 RHSA-2022-5636-01 Critical: Security Flaw

red hat
Calendar Grey July 27, 2022
Dist Redhat Esm H88
The latest kernel security patch and bug resolution update for Red Hat Enterprise Linux 8.1 tackles significant security flaws and vulnerabilities.
An update for kernel is now available for Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions

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

The system must be rebooted for this update to take effect.

Summary

The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* kernel: Small table perturb size in the TCP source port generation algorithm can lead to information leak (CVE-2022-1012)
* kernel: race condition in perf_event_open leads to privilege escalation (CVE-2022-1729)
* kernel: a use-after-free write in the netfilter subsystem can lead to privilege escalation to root (CVE-2022-32250)
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.
Bug Fix(es):
* Backport request of "genirq: use rcu in kstat_irqs_usr()" (BZ#2083311)

Topics%20covered

Topics Covered

security advisory information leak privilege escalation bug fix Red Hat Enterprise Linux important kernel

References

https://access.redhat.com/security/cve/CVE-2022-1012 https://access.redhat.com/security/cve/CVE-2022-1729 https://access.redhat.com/security/cve/CVE-2022-32250 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux BaseOS E4S (v. 8.1):
Source: kernel-4.18.0-147.70.1.el8_1.src.rpm
aarch64: bpftool-4.18.0-147.70.1.el8_1.aarch64.rpm bpftool-debuginfo-4.18.0-147.70.1.el8_1.aarch64.rpm kernel-4.18.0-147.70.1.el8_1.aarch64.rpm kernel-core-4.18.0-147.70.1.el8_1.aarch64.rpm kernel-cross-headers-4.18.0-147.70.1.el8_1.aarch64.rpm kernel-debug-4.18.0-147.70.1.el8_1.aarch64.rpm kernel-debug-core-4.18.0-147.70.1.el8_1.aarch64.rpm kernel-debug-debuginfo-4.18.0-147.70.1.el8_1.aarch64.rpm kernel-debug-devel-4.18.0-147.70.1.el8_1.aarch64.rpm kernel-debug-modules-4.18.0-147.70.1.el8_1.aarch64.rpm kernel-debug-modules-extra-4.18.0-147.70.1.el8_1.aarch64.rpm kernel-debuginfo-4.18.0-147.70.1.el8_1.aarch64.rpm kernel-debuginfo-common-aarch64-4.18.0-147.70.1.el8_1.aarch64.rpm kernel-devel-4.18.0-147.70.1.el8_1.aarch64.rpm kernel-headers-4.18.0-147.70.1.el8_1.aarch64.rpm kernel-modules-4.18.0-147.70.1.el8_1.aarch64.rpm kernel-modules-extra-4.18.0-147.70.1.el8_1.aarch64.rpm kernel-tools-4.18.0-147.70.1.el8_1.aarch64.rpm kernel-tools-debuginfo-4.18.0-147.70.1.el8_1.aarch64.rpm kernel-tools-libs-4.18.0-147.70.1.el8_1.aarch64.rpm perf-4.18.0-147.70.1.el8_1.aarch64.rpm perf-debuginfo-4.18.0-147.70.1.el8_1.aarch64.rpm python3-perf-4.18.0-147.70.1.el8_1.aarch64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2022:5636-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:5636
Issue date: 2022-07-19

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.1Update Services for SAP Solutions.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 information leak privilege escalation bug fix Red Hat Enterprise Linux important kernel

Relevant Releases Architectures

Red Hat Enterprise Linux BaseOS E4S (v. 8.1) - aarch64, noarch, ppc64le, s390x, x86_64

Bugs Fixed

2064604 - CVE-2022-1012 kernel: Small table perturb size in the TCP source port generation algorithm can lead to information leak

2086753 - CVE-2022-1729 kernel: race condition in perf_event_open leads to privilege escalation

2092427 - CVE-2022-32250 kernel: a use-after-free write in the netfilter subsystem can lead to privilege escalation to root

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