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Important Kernel-RT Update for Red Hat Enterprise Linux 7 RHSA-2019:3978-01

red hat
Calendar Grey November 26, 2019
Dist Redhat Esm H88
Crucial kernel-rt enhancement tackles possible privilege elevation and memory management vulnerabilities in Red Hat Enterprise Linux 7.
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: KVM: OOB memory access via mmio ring buffer (CVE-2019-14821)
* kernel: local attacker can trigger multiple use-after-free conditions results in privilege escalation (CVE-2019-15239)
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 RHEL7.7.z batch#3 source tree (BZ#1762889)

Topics%20covered

Topics Covered

security advisory Red Hat privilege escalation important memory access kernel-rt

References

https://access.redhat.com/security/cve/CVE-2019-14821 https://access.redhat.com/security/cve/CVE-2019-15239 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux for Real Time for NFV (v. 7):
Source: kernel-rt-3.10.0-1062.7.1.rt56.1030.el7.src.rpm
noarch: kernel-rt-doc-3.10.0-1062.7.1.rt56.1030.el7.noarch.rpm
x86_64: kernel-rt-3.10.0-1062.7.1.rt56.1030.el7.x86_64.rpm kernel-rt-debug-3.10.0-1062.7.1.rt56.1030.el7.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-1062.7.1.rt56.1030.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-1062.7.1.rt56.1030.el7.x86_64.rpm kernel-rt-debug-kvm-3.10.0-1062.7.1.rt56.1030.el7.x86_64.rpm kernel-rt-debug-kvm-debuginfo-3.10.0-1062.7.1.rt56.1030.el7.x86_64.rpm kernel-rt-debuginfo-3.10.0-1062.7.1.rt56.1030.el7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-1062.7.1.rt56.1030.el7.x86_64.rpm kernel-rt-devel-3.10.0-1062.7.1.rt56.1030.el7.x86_64.rpm kernel-rt-kvm-3.10.0-1062.7.1.rt56.1030.el7.x86_64.rpm kernel-rt-kvm-debuginfo-3.10.0-1062.7.1.rt56.1030.el7.x86_64.rpm kernel-rt-trace-3.10.0-1062.7.1.rt56.1030.el7.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-1062.7.1.rt56.1030.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-1062.7.1.rt56.1030.el7.x86_64.rpm kernel-rt-trace-kvm-3.10.0-1062.7.1.rt56.1030.el7.x86_64.rpm kernel-rt-trace-kvm-debuginfo-3.10.0-1062.7.1.rt56.1030.el7.x86_64.rpm
Red Hat Enterprise Linux Realtime (v. 7):
Source: kernel-rt-3.10.0-1062.7.1.rt56.1030.el7.src.rpm
noarch:

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2019:3978-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:3978
Issue date: 2019-11-26

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 Red Hat privilege escalation important memory access kernel-rt

Relevant Releases Architectures

Red Hat Enterprise Linux Realtime (v. 7) - noarch, x86_64

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

Bugs Fixed

1746708 - CVE-2019-14821 Kernel: KVM: OOB memory access via mmio ring buffer

1747353 - CVE-2019-15239 kernel: local attacker can trigger multiple use-after-free conditions results in privilege escalation

1762889 - kernel-rt: update to the RHEL7.7.z batch#3 source tree

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