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Red Hat Enterprise Linux 8.4: RHSA-2023:3462-01 Important Kernel-RT Update

red hat
Calendar Grey June 6, 2023
Dist Redhat Esm H88
Keep your Red Hat kernel-rt current to benefit from crucial security patches and bug fixes provided in this advisory.
An update for kernel-rt is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Telecommunications Update Service, ...

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: use-after-free in l2cap_connect and l2cap_le_connect_req in net/bluetooth/l2cap_core.c (CVE-2022-42896)
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 RHEL-8.4.z17 source tree (BZ#2185910)
* RHEL-8.7 kernel-rt: INFO: task deadline_test:2526 blocked for more than 600 seconds. (BZ#2188652)
* Crash: kernel BUG at kernel/locking/rtmutex.c:1338! (BZ#2188725)
* kernel-rt: workqueue: Fix divergence from stock 8.4 (BZ#2209152)

Topics%20covered

Topics Covered

security advisory update bug fix Red Hat Enterprise Linux important kernel-rt real-time kernel

References

https://access.redhat.com/security/cve/CVE-2022-42896 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux NFV E4S (v.8.4):
Source: kernel-rt-4.18.0-305.91.1.rt7.166.el8_4.src.rpm
x86_64: kernel-rt-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm kernel-rt-core-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm kernel-rt-debug-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm kernel-rt-debug-core-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm kernel-rt-debug-devel-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm kernel-rt-debug-kvm-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm kernel-rt-debug-modules-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm kernel-rt-debuginfo-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm kernel-rt-devel-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm kernel-rt-kvm-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm kernel-rt-modules-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm kernel-rt-modules-extra-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm
Red Hat Enterprise Linux NFV TUS (v.8.4):
Source: kernel-rt-4.18.0-305.91.1.rt7.166.el8_4.src.rpm
x86_64: kernel-rt-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm kernel-rt-core-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2023:3462-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2023:3462
Issue date: 2023-06-06

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.4Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4Telecommunications Update Service, and Red Hat Enterprise Linux 8.4 UpdateServices 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 update bug fix Red Hat Enterprise Linux important kernel-rt real-time kernel

Relevant Releases Architectures

Red Hat Enterprise Linux NFV E4S (v.8.4) - x86_64

Red Hat Enterprise Linux NFV TUS (v.8.4) - x86_64

Red Hat Enterprise Linux RT TUS (v.8.4) - x86_64

Bugs Fixed

2147364 - CVE-2022-42896 kernel: use-after-free in l2cap_connect and l2cap_le_connect_req in net/bluetooth/l2cap_core.c

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