Alerts This Week
Warning Icon 1 758
Alerts This Week
Warning Icon 1 758

Red Hat Enterprise Linux 7: RHSA-2019-0188-01 Important: kernel-rt Security

red hat
Calendar Grey January 29, 2019
Dist Redhat Esm H88
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ====================================================
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: Use-after-free due to race condition in AF_PACKET implementation (CVE-2018-18559)
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.
Bug Fix(es):
* The kernel-rt packages have been upgraded to the 3.10.0-957.5.1 source tree, which provides a number of bug fixes over the previous version. (BZ#1653822)
* Under certain circumstances, the following warning message, which indicated a SCHED_DEADLINE bandwidth tracking mechanism error, occurred:
WARNING: CPU: 8 PID: 19536 at kernel/sched/deadline.c:64 dequeue_task_dl+0x121/0x140
This update fixes the sched_setscheduler() core kernel function, and backports multiple upstream patches to the SCHED_DEADLINE scheduler. As a result, the SCHED_DEADLINE bandwidth tracking mechanism is prevented from error conditions, and the warning message no longer occurs. (BZ#1655439)

Topics%20covered

Topics Covered

security advisory bug fix Red Hat Enterprise Linux security impact kernel-rt use-after-free Important

References

https://access.redhat.com/security/cve/CVE-2018-18559 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux for Real Time for NFV (v. 7):
Source: kernel-rt-3.10.0-957.5.1.rt56.916.el7.src.rpm
noarch: kernel-rt-doc-3.10.0-957.5.1.rt56.916.el7.noarch.rpm
x86_64: kernel-rt-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-debug-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-debug-kvm-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-debug-kvm-debuginfo-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-debuginfo-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-devel-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-kvm-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-kvm-debuginfo-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-trace-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-trace-kvm-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-trace-kvm-debuginfo-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm
Red Hat Enterprise Linux Realtime (v. 7):
Source: kernel-rt-3.10.0-957.5.1.rt56.916.el7.src.rpm
noarch:

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2019:0188-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:0188
Issue date: 2019-01-29

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 Red Hat Enterprise Linux security impact kernel-rt use-after-free Important

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

1641878 - CVE-2018-18559 kernel: Use-after-free due to race condition in AF_PACKET implementation

Get the latest News and Insights

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

Your message here