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Red Hat: RHSA-2023:3350-01 Important: Kernel-RT Privilege Escalation

red hat
Calendar Grey June 3, 2023
Scroller Redhat
Ubuntu LTS 22.04 enhances kernel-security with critical patches targeting vulnerability exploitation and system errors.
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: netfilter: use-after-free in nf_tables when processing batch requests can lead to privilege escalation (CVE-2023-32233)
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):
* smpboot: Scheduler frequency invariance went wobbly, disabling! (BZ#2188316)
* Crash: kernel BUG at kernel/locking/rtmutex.c:1338! (BZ#2188722)
* kernel-rt: update RT source tree to the RHEL-8.8.z0 source tree. (BZ#2196667)

Topics%20covered

Topics Covered

security advisory red hat kernel update privilege escalation bug fix important linux

References

https://access.redhat.com/security/cve/CVE-2023-32233 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux NFV (v. 8):
Source: kernel-rt-4.18.0-477.13.1.rt7.276.el8_8.src.rpm
x86_64: kernel-rt-4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm kernel-rt-core-4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm kernel-rt-debug-4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm kernel-rt-debug-core-4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm kernel-rt-debug-devel-4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm kernel-rt-debug-kvm-4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm kernel-rt-debug-modules-4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm kernel-rt-debuginfo-4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm kernel-rt-devel-4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm kernel-rt-kvm-4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm kernel-rt-modules-4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm kernel-rt-modules-extra-4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm
Red Hat Enterprise Linux RT (v. 8):
Source: kernel-rt-4.18.0-477.13.1.rt7.276.el8_8.src.rpm
x86_64: kernel-rt-4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm kernel-rt-core-4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm kernel-rt-debug-4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2023:3350-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2023:3350
Issue date: 2023-05-30

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 red hat kernel update privilege escalation bug fix important linux

Relevant Releases Architectures

Red Hat Enterprise Linux NFV (v. 8) - x86_64

Red Hat Enterprise Linux RT (v. 8) - x86_64

Bugs Fixed

2196105 - CVE-2023-32233 kernel: netfilter: use-after-free in nf_tables when processing batch requests can lead to privilege escalation

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