Alerts This Week
Warning Icon 1 714
Alerts This Week
Warning Icon 1 714

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

red hat
Calendar Grey February 21, 2023
Dist Redhat Esm H88
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

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here