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Red Hat Enterprise Linux 7: RHSA-2020-5026-01 Moderate: Kernel-RT Update

red hat
Calendar Grey November 10, 2020
Dist Redhat Esm H88
The latest update for Red Hat kernel-rt addresses notable security vulnerabilities while delivering significant enhancements and optimizations.
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: kernel: buffer over write in vgacon_scroll (CVE-2020-14331)
* kernel: net-sysfs: *_queue_add_kobject refcount issue (CVE-2019-20811)
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):
* [RHEL-7.9] net/ipv6/ip6_flowlabel.c:85 suspicious rcu_dereference_check() usage! (kernel-rt-debug) (BZ#1836846)
* md/raid: sleeping function called from invalid context triggered by CKI storage/swraid/trim test (BZ#1857872)
* Infinite looping when trying to acquire eventpoll->mtx during eventpoll_release_file, 2nd try (BZ#1877695)
* kernel-rt: update to the latest RHEL7.9.z1 source tree (BZ#1883995)

Topics%20covered

Topics Covered

security advisory moderate buffer overflow bug fix Red Hat Enterprise Linux kernel-rt net-sysfs issue

References

https://access.redhat.com/security/cve/CVE-2019-20811 https://access.redhat.com/security/cve/CVE-2020-14331 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Enterprise Linux for Real Time for NFV (v. 7):
Source: kernel-rt-3.10.0-1160.6.1.rt56.1139.el7.src.rpm
noarch: kernel-rt-doc-3.10.0-1160.6.1.rt56.1139.el7.noarch.rpm
x86_64: kernel-rt-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm kernel-rt-debug-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm kernel-rt-debug-kvm-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm kernel-rt-debug-kvm-debuginfo-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm kernel-rt-debuginfo-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm kernel-rt-devel-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm kernel-rt-kvm-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm kernel-rt-kvm-debuginfo-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm kernel-rt-trace-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm kernel-rt-trace-kvm-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm kernel-rt-trace-kvm-debuginfo-3.10.0-1160.6.1.rt56.1139.el7.x86_64.rpm
Red Hat Enterprise Linux for Real Time (v. 7):
Source: kernel-rt-3.10.0-1160.6.1.rt56.1139.el7.src.rpm
noarch:

Read the Full Advisory


Advisory ID: RHSA-2020:5026-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:5026
Issue date: 2020-11-10

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 buffer overflow bug fix Red Hat Enterprise Linux kernel-rt net-sysfs issue

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

1846439 - CVE-2019-20811 kernel: net-sysfs: *_queue_add_kobject refcount issue

1858679 - CVE-2020-14331 kernel: kernel: buffer over write in vgacon_scroll

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