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Red Hat 8.2: RHSA-2022-5224-01 Critical: Kernel-RT Privilege Risk Alert

red hat
Calendar Grey June 28, 2022
Dist Redhat Esm H88
Kernel-rt upgrade for CentOS Linux tackles critical vulnerabilities and issues, improving system security and performance stability.
An update for kernel-rt 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

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

Summary

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.
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-2022-1966)
* kernel: buffer overflow in IPsec ESP transformation code (CVE-2022-27666)
* kernel: the copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check (CVE-2020-29368)
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):
* kernel-rt: update RT source tree to the latest RHEL-8.2.z18 Batch (BZ#2081080)

Topics%20covered

Topics Covered

security advisory Red Hat buffer overflow privilege escalation important update kernel-rt

References

https://access.redhat.com/security/cve/CVE-2020-29368 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-2022-1966 https://access.redhat.com/security/cve/CVE-2022-27666 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2):
Source: kernel-rt-4.18.0-193.87.1.rt13.137.el8_2.src.rpm
x86_64: kernel-rt-4.18.0-193.87.1.rt13.137.el8_2.x86_64.rpm kernel-rt-core-4.18.0-193.87.1.rt13.137.el8_2.x86_64.rpm kernel-rt-debug-4.18.0-193.87.1.rt13.137.el8_2.x86_64.rpm kernel-rt-debug-core-4.18.0-193.87.1.rt13.137.el8_2.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-193.87.1.rt13.137.el8_2.x86_64.rpm kernel-rt-debug-devel-4.18.0-193.87.1.rt13.137.el8_2.x86_64.rpm kernel-rt-debug-kvm-4.18.0-193.87.1.rt13.137.el8_2.x86_64.rpm kernel-rt-debug-modules-4.18.0-193.87.1.rt13.137.el8_2.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-193.87.1.rt13.137.el8_2.x86_64.rpm kernel-rt-debuginfo-4.18.0-193.87.1.rt13.137.el8_2.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-193.87.1.rt13.137.el8_2.x86_64.rpm kernel-rt-devel-4.18.0-193.87.1.rt13.137.el8_2.x86_64.rpm kernel-rt-kvm-4.18.0-193.87.1.rt13.137.el8_2.x86_64.rpm kernel-rt-modules-4.18.0-193.87.1.rt13.137.el8_2.x86_64.rpm kernel-rt-modules-extra-4.18.0-193.87.1.rt13.137.el8_2.x86_64.rpm
Red Hat Enterprise Linux Real Time EUS (v. 8.2):
Source: kernel-rt-4.18.0-193.87.1.rt13.137.el8_2.src.rpm
x86_64: kernel-rt-4.18.0-193.87.1.rt13.137.el8_2.x86_64.rpm kernel-rt-core-4.18.0-193.87.1.rt13.137.el8_2.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2022:5224-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:5224
Issue date: 2022-06-28

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.2Extended 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.

Topics%20covered

Topics Covered

security advisory Red Hat buffer overflow privilege escalation important update kernel-rt

Relevant Releases Architectures

Red Hat Enterprise Linux Real Time EUS (v. 8.2) - x86_64

Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2) - x86_64

Bugs Fixed

1903244 - CVE-2020-29368 kernel: the copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check

2061633 - CVE-2022-27666 kernel: buffer overflow in IPsec ESP transformation code

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-2022-1966 kernel: a use-after-free write in the netfilter subsystem can lead to privilege escalation to root

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