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Red Hat Enterprise Linux 8 RHSA-2022:5834 Important Kernel-RT Security Fix

red hat
Calendar Grey August 3, 2022
Dist Redhat Esm H88
The recent kernel-rt patch for Red Hat Enterprise Linux 8 tackles significant security vulnerabilities along with various bug resolutions. Discover further details within.
An update for kernel-rt 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

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: 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):
* The latest RHEL 8.6.z2 kernel changes need to be merged into the RT source tree to keep source parity between the two kernels. (BZ#2107215)

Topics%20covered

Topics Covered

security advisory information leak privilege escalation security fix Red Hat Enterprise Linux kernel-rt Important

References

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

Package List

Red Hat Enterprise Linux Real Time for NFV (v. 8):
Source: kernel-rt-4.18.0-372.19.1.rt7.176.el8_6.src.rpm
x86_64: kernel-rt-4.18.0-372.19.1.rt7.176.el8_6.x86_64.rpm kernel-rt-core-4.18.0-372.19.1.rt7.176.el8_6.x86_64.rpm kernel-rt-debug-4.18.0-372.19.1.rt7.176.el8_6.x86_64.rpm kernel-rt-debug-core-4.18.0-372.19.1.rt7.176.el8_6.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-372.19.1.rt7.176.el8_6.x86_64.rpm kernel-rt-debug-devel-4.18.0-372.19.1.rt7.176.el8_6.x86_64.rpm kernel-rt-debug-kvm-4.18.0-372.19.1.rt7.176.el8_6.x86_64.rpm kernel-rt-debug-modules-4.18.0-372.19.1.rt7.176.el8_6.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-372.19.1.rt7.176.el8_6.x86_64.rpm kernel-rt-debuginfo-4.18.0-372.19.1.rt7.176.el8_6.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-372.19.1.rt7.176.el8_6.x86_64.rpm kernel-rt-devel-4.18.0-372.19.1.rt7.176.el8_6.x86_64.rpm kernel-rt-kvm-4.18.0-372.19.1.rt7.176.el8_6.x86_64.rpm kernel-rt-modules-4.18.0-372.19.1.rt7.176.el8_6.x86_64.rpm kernel-rt-modules-extra-4.18.0-372.19.1.rt7.176.el8_6.x86_64.rpm
Red Hat Enterprise Linux Real Time (v. 8):
Source: kernel-rt-4.18.0-372.19.1.rt7.176.el8_6.src.rpm
x86_64: kernel-rt-4.18.0-372.19.1.rt7.176.el8_6.x86_64.rpm kernel-rt-core-4.18.0-372.19.1.rt7.176.el8_6.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2022:5834-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:5834
Issue date: 2022-08-02

Topic

An update for kernel-rt 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 information leak privilege escalation security fix Red Hat Enterprise Linux kernel-rt Important

Relevant Releases Architectures

Red Hat Enterprise Linux Real Time (v. 8) - x86_64

Red Hat Enterprise Linux Real Time for NFV (v. 8) - 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

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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