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Red Hat 7: RHSA-2022-5939-01 Moderate Kernel-Rt Security Update

red hat
Calendar Grey August 9, 2022
Dist Redhat Esm H88
Kernel-rt patch released for Red Hat, addressing moderate security vulnerabilities. Access specifics on issues and resolutions here.
An update for kernel-rt is now available for Red Hat Enterprise Linux 7

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):
* Incomplete cleanup of multi-core shared buffers (aka SBDR) (CVE-2022-21123)
* Incomplete cleanup of microarchitectural fill buffers (aka SBDS) (CVE-2022-21125)
* Incomplete cleanup in specific special register write operations (aka DRPW) (CVE-2022-21166)
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):
* The kernel-rt crashes where one task is indefinitely looping in __start_cfs_bandwidth() with the cfs_b->lock spinlock being held (BZ#2079976)
* update to the latest RHEL7.9.z16 source tree (BZ#2100182)

Topics%20covered

Topics Covered

security advisory moderate bug fix security fix Red Hat Enterprise Linux kernel-rt

References

https://access.redhat.com/security/cve/CVE-2022-21123 https://access.redhat.com/security/cve/CVE-2022-21125 https://access.redhat.com/security/cve/CVE-2022-21166 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Enterprise Linux for Real Time for NFV (v. 7):
Source: kernel-rt-3.10.0-1160.76.1.rt56.1220.el7.src.rpm
noarch: kernel-rt-doc-3.10.0-1160.76.1.rt56.1220.el7.noarch.rpm
x86_64: kernel-rt-3.10.0-1160.76.1.rt56.1220.el7.x86_64.rpm kernel-rt-debug-3.10.0-1160.76.1.rt56.1220.el7.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-1160.76.1.rt56.1220.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-1160.76.1.rt56.1220.el7.x86_64.rpm kernel-rt-debug-kvm-3.10.0-1160.76.1.rt56.1220.el7.x86_64.rpm kernel-rt-debug-kvm-debuginfo-3.10.0-1160.76.1.rt56.1220.el7.x86_64.rpm kernel-rt-debuginfo-3.10.0-1160.76.1.rt56.1220.el7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-1160.76.1.rt56.1220.el7.x86_64.rpm kernel-rt-devel-3.10.0-1160.76.1.rt56.1220.el7.x86_64.rpm kernel-rt-kvm-3.10.0-1160.76.1.rt56.1220.el7.x86_64.rpm kernel-rt-kvm-debuginfo-3.10.0-1160.76.1.rt56.1220.el7.x86_64.rpm kernel-rt-trace-3.10.0-1160.76.1.rt56.1220.el7.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-1160.76.1.rt56.1220.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-1160.76.1.rt56.1220.el7.x86_64.rpm kernel-rt-trace-kvm-3.10.0-1160.76.1.rt56.1220.el7.x86_64.rpm kernel-rt-trace-kvm-debuginfo-3.10.0-1160.76.1.rt56.1220.el7.x86_64.rpm
Red Hat Enterprise Linux for Real Time (v. 7):
Source:

Read the Full Advisory


Advisory ID: RHSA-2022:5939-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:5939
Issue date: 2022-08-09

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory moderate bug fix security fix Red Hat Enterprise Linux kernel-rt

Relevant Releases Architectures

Red Hat Enterprise Linux for Real Time (v. 7) - noarch, x86_64

Red Hat Enterprise Linux for Real Time for NFV (v. 7) - noarch, x86_64

Bugs Fixed

2090237 - CVE-2022-21123 hw: cpu: Incomplete cleanup of multi-core shared buffers (aka SBDR)

2090240 - CVE-2022-21125 hw: cpu: Incomplete cleanup of microarchitectural fill buffers (aka SBDS)

2090241 - CVE-2022-21166 hw: cpu: Incomplete cleanup in specific special register write operations (aka DRPW)

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