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Kernel-RT Security Update: Red Hat Enterprise Linux 7 RHSA-2019-0514-01

red hat
Calendar Grey March 13, 2019
Dist Redhat Esm H88
The advisory from Red Hat outlines a vital kernel-rt update targeting security vulnerabilities. Users must perform the upgrade promptly.
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: Memory corruption due to incorrect socket cloning (CVE-2018-9568)
* kernel: Unprivileged users able to inspect kernel stacks of arbitrary tasks (CVE-2018-17972)
* kernel: Faulty computation of numberic bounds in the BPF verifier (CVE-2018-18445)
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 RHEL7.6.z batch#3 source tree (BZ#1672406)
Users of kernel-rt are advised to upgrade to these updated packages, which fix this bug.

Topics%20covered

Topics Covered

security advisory bug fix memory corruption Red Hat Enterprise Linux important kernel-rt unprivileged access

References

https://access.redhat.com/security/cve/CVE-2018-9568 https://access.redhat.com/security/cve/CVE-2018-17972 https://access.redhat.com/security/cve/CVE-2018-18445 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux for Real Time for NFV (v. 7):
Source: kernel-rt-3.10.0-957.10.1.rt56.921.el7.src.rpm
noarch: kernel-rt-doc-3.10.0-957.10.1.rt56.921.el7.noarch.rpm
x86_64: kernel-rt-3.10.0-957.10.1.rt56.921.el7.x86_64.rpm kernel-rt-debug-3.10.0-957.10.1.rt56.921.el7.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-957.10.1.rt56.921.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-957.10.1.rt56.921.el7.x86_64.rpm kernel-rt-debug-kvm-3.10.0-957.10.1.rt56.921.el7.x86_64.rpm kernel-rt-debug-kvm-debuginfo-3.10.0-957.10.1.rt56.921.el7.x86_64.rpm kernel-rt-debuginfo-3.10.0-957.10.1.rt56.921.el7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-957.10.1.rt56.921.el7.x86_64.rpm kernel-rt-devel-3.10.0-957.10.1.rt56.921.el7.x86_64.rpm kernel-rt-kvm-3.10.0-957.10.1.rt56.921.el7.x86_64.rpm kernel-rt-kvm-debuginfo-3.10.0-957.10.1.rt56.921.el7.x86_64.rpm kernel-rt-trace-3.10.0-957.10.1.rt56.921.el7.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-957.10.1.rt56.921.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-957.10.1.rt56.921.el7.x86_64.rpm kernel-rt-trace-kvm-3.10.0-957.10.1.rt56.921.el7.x86_64.rpm kernel-rt-trace-kvm-debuginfo-3.10.0-957.10.1.rt56.921.el7.x86_64.rpm
Red Hat Enterprise Linux Realtime (v. 7):
Source: kernel-rt-3.10.0-957.10.1.rt56.921.el7.src.rpm
noarch:

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2019:0514-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:0514
Issue date: 2019-03-12

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 memory corruption Red Hat Enterprise Linux important kernel-rt unprivileged access

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

1636349 - CVE-2018-17972 kernel: Unprivileged users able to inspect kernel stacks of arbitrary tasks

1640596 - CVE-2018-18445 kernel: Faulty computation of numberic bounds in the BPF verifier

1655904 - CVE-2018-9568 kernel: Memory corruption due to incorrect socket cloning

1672406 - kernel-rt: update to the RHEL7.6.z batch#3 source tree

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