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Red Hat Enterprise Linux 8 RHSA-2023-1584-01 Important Kernel-Rt Fix

red hat
Calendar Grey April 4, 2023
Dist Redhat Esm H88
The recent kernel-rt upgrade resolves critical vulnerabilities in Red Hat Enterprise Linux 8, introducing a variety of improvements and corrections.
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: stack overflow in do_proc_dointvec and proc_skip_spaces (CVE-2022-4378)
* ALSA: pcm: Move rwsem lock inside snd_ctl_elem_read to prevent UAF (CVE-2023-0266)
* kernel: FUSE filesystem low-privileged user privileges escalation (CVE-2023-0386)
* kernel: net: CPU soft lockup in TC mirred egress-to-ingress action (CVE-2022-4269)
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):
* Lazy irq_work does not raise softirq on PREEMPT_RT [rhel-8] (BZ#2172163)
* The latest RHEL 8.7.z3 kernel changes need to be merged into the RT source tree to keep source parity between the two kernels. (BZ#2172278)

Topics%20covered

Topics Covered

security advisory Red Hat kernel update security impact important fix real time kernel CVSS score

References

https://access.redhat.com/security/cve/CVE-2022-4269 https://access.redhat.com/security/cve/CVE-2022-4378 https://access.redhat.com/security/cve/CVE-2023-0266 https://access.redhat.com/security/cve/CVE-2023-0386 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Real Time for NFV (v. 8):
Source: kernel-rt-4.18.0-425.19.2.rt7.230.el8_7.src.rpm
x86_64: kernel-rt-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm kernel-rt-core-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm kernel-rt-debug-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm kernel-rt-debug-core-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm kernel-rt-debug-devel-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm kernel-rt-debug-kvm-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm kernel-rt-debug-modules-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm kernel-rt-debuginfo-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm kernel-rt-devel-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm kernel-rt-kvm-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm kernel-rt-modules-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm kernel-rt-modules-extra-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm
Red Hat Enterprise Linux for Real Time (v. 8):
Source: kernel-rt-4.18.0-425.19.2.rt7.230.el8_7.src.rpm
x86_64: kernel-rt-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm kernel-rt-core-4.18.0-425.19.2.rt7.230.el8_7.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2023:1584-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2023:1584
Issue date: 2023-04-04

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 security impact important fix real time kernel CVSS score

Relevant Releases Architectures

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

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

Bugs Fixed

2150272 - CVE-2022-4269 kernel: net: CPU soft lockup in TC mirred egress-to-ingress action

2152548 - CVE-2022-4378 kernel: stack overflow in do_proc_dointvec and proc_skip_spaces

2159505 - CVE-2023-0386 kernel: FUSE filesystem low-privileged user privileges escalation

2163379 - CVE-2023-0266 ALSA: pcm: Move rwsem lock inside snd_ctl_elem_read to prevent UAF

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