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Red Hat Enterprise Linux 7 RHSA-2018-1944-01 Moderate: FPU Leak

red hat
Calendar Grey June 19, 2018
Scroller Redhat
CentOS 7 gets an important security patch for kernel-rt, focusing on preventing memory disclosures. Keep your system safe!
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: FPU state information leakage via lazy FPU restore (CVE-2018-3665)
For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.
Red Hat would like to thank Julian Stecklina (Amazon.de), Thomas Prescher (cyberus-technology.de), and Zdenek Sojka (sysgo.com) for reporting this issue.

Topics%20covered

Topics Covered

security advisory security update moderate threat Red Hat Enterprise kernel-rt FPU leak

References

https://access.redhat.com/security/cve/CVE-2018-3665 https://access.redhat.com/security/updates/classification#moderate https://access.redhat.com/solutions/3485131

Package List

Red Hat Enterprise Linux for Real Time for NFV (v. 7):
Source: kernel-rt-3.10.0-862.3.3.rt56.809.el7.src.rpm
noarch: kernel-rt-doc-3.10.0-862.3.3.rt56.809.el7.noarch.rpm
x86_64: kernel-rt-3.10.0-862.3.3.rt56.809.el7.x86_64.rpm kernel-rt-debug-3.10.0-862.3.3.rt56.809.el7.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-862.3.3.rt56.809.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-862.3.3.rt56.809.el7.x86_64.rpm kernel-rt-debug-kvm-3.10.0-862.3.3.rt56.809.el7.x86_64.rpm kernel-rt-debug-kvm-debuginfo-3.10.0-862.3.3.rt56.809.el7.x86_64.rpm kernel-rt-debuginfo-3.10.0-862.3.3.rt56.809.el7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-862.3.3.rt56.809.el7.x86_64.rpm kernel-rt-devel-3.10.0-862.3.3.rt56.809.el7.x86_64.rpm kernel-rt-kvm-3.10.0-862.3.3.rt56.809.el7.x86_64.rpm kernel-rt-kvm-debuginfo-3.10.0-862.3.3.rt56.809.el7.x86_64.rpm kernel-rt-trace-3.10.0-862.3.3.rt56.809.el7.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-862.3.3.rt56.809.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-862.3.3.rt56.809.el7.x86_64.rpm kernel-rt-trace-kvm-3.10.0-862.3.3.rt56.809.el7.x86_64.rpm kernel-rt-trace-kvm-debuginfo-3.10.0-862.3.3.rt56.809.el7.x86_64.rpm
Red Hat Enterprise Linux Realtime (v. 7):
Source: kernel-rt-3.10.0-862.3.3.rt56.809.el7.src.rpm
noarch:

Read the Full Advisory


Advisory ID: RHSA-2018:1944-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:1944
Issue date: 2018-06-19

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 security update moderate threat Red Hat Enterprise kernel-rt FPU leak

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

1585011 - CVE-2018-3665 Kernel: FPU state information leakage via lazy FPU restore

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