Explore top 10 tips to secure your open-source projects now. Read More

×
Alerts This Week
Warning Icon 1 544
Alerts This Week
Warning Icon 1 544

Red Hat Enterprise Linux: RHSA-2018-2763-01 Important Kernel-RT Update

red hat
Calendar Grey September 25, 2018
Scroller Redhat Esm H88
Red Hat announces a crucial revision for kernel-rt aimed at mitigating security vulnerabilities and resolving issues in 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: Integer overflow in Linux's create_elf_tables function (CVE-2018-14634)
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 Qualys Research Labs for reporting this issue.
Bug Fix(es):
* The kernel-rt packages have been upgraded to the 3.10.0-862.14.3 source tree, which provides a number of bug fixes over the previous version. (BZ#1616429)
* Previously, preemption was enabled too early after a context switch. If a task was migrated to another CPU after a context switch, a mismatch between CPU and runqueue during load balancing sometimes occurred. Consequently, a runnable task on an idle CPU failed to run, and the operating system became unresponsive. This update disables preemption in the schedule_tail() function. As a result, CPU migration during post-schedule processing no longer occurs, which prevents the above mismatch. The operating system no longer hangs due to this bug. (BZ#1617941)

Topics%20covered

Topics Covered

security advisory red hat kernel update bug fix important integer overflow real time

References

https://access.redhat.com/security/cve/CVE-2018-14634 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux for Real Time for NFV (v. 7):
Source: kernel-rt-3.10.0-862.14.4.rt56.821.el7.src.rpm
noarch: kernel-rt-doc-3.10.0-862.14.4.rt56.821.el7.noarch.rpm
x86_64: kernel-rt-3.10.0-862.14.4.rt56.821.el7.x86_64.rpm kernel-rt-debug-3.10.0-862.14.4.rt56.821.el7.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-862.14.4.rt56.821.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-862.14.4.rt56.821.el7.x86_64.rpm kernel-rt-debug-kvm-3.10.0-862.14.4.rt56.821.el7.x86_64.rpm kernel-rt-debug-kvm-debuginfo-3.10.0-862.14.4.rt56.821.el7.x86_64.rpm kernel-rt-debuginfo-3.10.0-862.14.4.rt56.821.el7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-862.14.4.rt56.821.el7.x86_64.rpm kernel-rt-devel-3.10.0-862.14.4.rt56.821.el7.x86_64.rpm kernel-rt-kvm-3.10.0-862.14.4.rt56.821.el7.x86_64.rpm kernel-rt-kvm-debuginfo-3.10.0-862.14.4.rt56.821.el7.x86_64.rpm kernel-rt-trace-3.10.0-862.14.4.rt56.821.el7.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-862.14.4.rt56.821.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-862.14.4.rt56.821.el7.x86_64.rpm kernel-rt-trace-kvm-3.10.0-862.14.4.rt56.821.el7.x86_64.rpm kernel-rt-trace-kvm-debuginfo-3.10.0-862.14.4.rt56.821.el7.x86_64.rpm
Red Hat Enterprise Linux Realtime (v. 7):
Source: kernel-rt-3.10.0-862.14.4.rt56.821.el7.src.rpm
noarch:

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2018:2763-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:2763
Issue date: 2018-09-25

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 kernel update bug fix important integer overflow real time

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

1616429 - kernel-rt: update to the RHEL7.5.z batch#4 source tree

1617941 - RT system hang due to wrong of rq's nr_running [rhel-7.5.z]

1624498 - CVE-2018-14634 kernel: Integer overflow in Linux's create_elf_tables function

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.