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Red Hat Enterprise Linux 7 Important: RHSA-2022:1199-01 Kernel-RT Update

red hat
Calendar Grey April 5, 2022
Dist Redhat Esm H88
Notice regarding kernel-rt for Red Hat Enterprise Linux 7, containing critical security patches and optimizations for improved performance.
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):
* kernel: use-after-free in RDMA listen() (CVE-2021-4028)
* kernel: fget: check that the fd still exists after getting a ref to it (CVE-2021-4083)
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 to the latest RHEL7.9.z13 source tree (BZ#2059411)

Topics%20covered

Topics Covered

security advisory bug fix Red Hat Enterprise Linux important kernel-rt use-after-free fget

References

https://access.redhat.com/security/cve/CVE-2021-4028 https://access.redhat.com/security/cve/CVE-2021-4083 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux for Real Time for NFV (v. 7):
Source: kernel-rt-3.10.0-1160.62.1.rt56.1203.el7.src.rpm
noarch: kernel-rt-doc-3.10.0-1160.62.1.rt56.1203.el7.noarch.rpm
x86_64: kernel-rt-3.10.0-1160.62.1.rt56.1203.el7.x86_64.rpm kernel-rt-debug-3.10.0-1160.62.1.rt56.1203.el7.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-1160.62.1.rt56.1203.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-1160.62.1.rt56.1203.el7.x86_64.rpm kernel-rt-debug-kvm-3.10.0-1160.62.1.rt56.1203.el7.x86_64.rpm kernel-rt-debug-kvm-debuginfo-3.10.0-1160.62.1.rt56.1203.el7.x86_64.rpm kernel-rt-debuginfo-3.10.0-1160.62.1.rt56.1203.el7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-1160.62.1.rt56.1203.el7.x86_64.rpm kernel-rt-devel-3.10.0-1160.62.1.rt56.1203.el7.x86_64.rpm kernel-rt-kvm-3.10.0-1160.62.1.rt56.1203.el7.x86_64.rpm kernel-rt-kvm-debuginfo-3.10.0-1160.62.1.rt56.1203.el7.x86_64.rpm kernel-rt-trace-3.10.0-1160.62.1.rt56.1203.el7.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-1160.62.1.rt56.1203.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-1160.62.1.rt56.1203.el7.x86_64.rpm kernel-rt-trace-kvm-3.10.0-1160.62.1.rt56.1203.el7.x86_64.rpm kernel-rt-trace-kvm-debuginfo-3.10.0-1160.62.1.rt56.1203.el7.x86_64.rpm
Red Hat Enterprise Linux for Real Time (v. 7):
Source:

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2022:1199-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:1199
Issue date: 2022-04-05

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 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 bug fix Red Hat Enterprise Linux important kernel-rt use-after-free fget

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

2027201 - CVE-2021-4028 kernel: use-after-free in RDMA listen()

2029923 - CVE-2021-4083 kernel: fget: check that the fd still exists after getting a ref to it

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