[Ksplice][Virtuozzo 4.7 Updates] New Ksplice updates for Virtuozzo 4.7 or OpenVZ on RHEL 6 (2.6.32-042stab138.1)
Oracle Ksplice
ksplice-support_ww at oracle.com
Fri May 31 06:57:35 PDT 2019
Synopsis: 2.6.32-042stab138.1 can now be patched using Ksplice
CVEs: CVE-2018-12126 CVE-2018-12127 CVE-2018-12130 CVE-2019-11091
Systems running Virtuozzo 4.7 or the OpenVZ RHEL 6 kernel can now use
Ksplice to patch against the latest Parallels Virtuozzo Containers 4.7
kernel security update, 2.6.32-042stab138.1.
INSTALLING THE UPDATES
We recommend that all users of Ksplice Uptrack running Virtuozzo 4.7
or OpenVZ on RHEL 6 install these updates.
On systems that have "autoinstall = yes" in /etc/uptrack/uptrack.conf,
these updates will be installed automatically and you do not need to
take any action.
Alternatively, you can install these updates by running:
# /usr/sbin/uptrack-upgrade -y
DESCRIPTION
* CVE-2019-11091, CVE-2018-12126, CVE-2018-12130, CVE-2018-12127: Microarchitectural Data Sampling.
A hardware vulnerability on various Intel x86 processors can allow a process to
speculatively access privileged information stored in CPU microarchitectural
buffers. A local user or guest VM could use this flaw to learn information
about the host kernel or hypervisor and use this to facilitate a further
attack.
Updated microcode is required for the mitigation to be effective, please see
the output of /sys/devices/system/cpu/vulnerabilities/mds to determine whether
the microcode supports the mitigation.
This update does not mitigate the vulnerability when SMT is in use. SMT can be
disabled with the following command:
echo off > /sys/devices/system/cpu/smt/control
SUPPORT
Ksplice support is available at ksplice-support_ww at oracle.com.
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