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Red Hat: RHSA-2023:0854-01 Important: Kernel-RT Security Update

red hat
Calendar Grey February 21, 2023
Scroller Redhat
Key announcement regarding Red Hat's Real Time kernel-rt highlights vital security patches and essential bug resolutions. Discover further details today.
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: mm/mremap.c use-after-free vulnerability (CVE-2022-41222)
* kernel: nfsd buffer overflow by RPC message over TCP with garbage data (CVE-2022-43945)
* kernel: an out-of-bounds vulnerability in i2c-ismt driver (CVE-2022-2873)
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):
* RHEL8-RT: Backport use of a dedicate thread for timer wakeups (BZ#2127204)
* SNO Crashed twice - kernel BUG at lib/list_debug.c:28 (BZ#2132062)
* Cannot trigger kernel dump using NMI on SNO node running PAO and RT kernel [RT-8] (BZ#2139851)
* scheduling while atomic in fpu_clone() -> fpu_inherit_perms() (BZ#2154469)
* The latest RHEL 8.7.z2 kernel changes need to be merged into the RT source tree to keep source parity between the two kernels. (BZ#2159806)

Topics%20covered

Topics Covered

security advisory Red Hat buffer overflow important out-of-bounds kernel-rt use-after-free

References

https://access.redhat.com/security/cve/CVE-2022-2873 https://access.redhat.com/security/cve/CVE-2022-41222 https://access.redhat.com/security/cve/CVE-2022-43945 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Real Time for NFV (v. 8):
Source: kernel-rt-4.18.0-425.13.1.rt7.223.el8_7.src.rpm
x86_64: kernel-rt-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm kernel-rt-core-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm kernel-rt-debug-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm kernel-rt-debug-core-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm kernel-rt-debug-devel-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm kernel-rt-debug-kvm-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm kernel-rt-debug-modules-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm kernel-rt-debuginfo-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm kernel-rt-devel-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm kernel-rt-kvm-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm kernel-rt-modules-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm kernel-rt-modules-extra-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm
Red Hat Enterprise Linux for Real Time (v. 8):
Source: kernel-rt-4.18.0-425.13.1.rt7.223.el8_7.src.rpm
x86_64: kernel-rt-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm kernel-rt-core-4.18.0-425.13.1.rt7.223.el8_7.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2023:0854-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2023:0854
Issue date: 2023-02-21

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 buffer overflow important out-of-bounds kernel-rt use-after-free

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

2119048 - CVE-2022-2873 kernel: an out-of-bounds vulnerability in i2c-ismt driver

2138818 - CVE-2022-41222 kernel: mm/mremap.c use-after-free vulnerability

2141752 - CVE-2022-43945 kernel: nfsd buffer overflow by RPC message over TCP with garbage data

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