[El-errata] New Ksplice updates for UEKR3 3.8.13 on OL6 and OL7 (ELSA-2019-4838)

[Errata Announcements for Oracle Linux]

Synopsis: ELSA-2019-4838 can now be patched using Ksplice
CVEs: CVE-2019-11135

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Linux Security Advisory, ELSA-2019-4838.
More information about this errata can be found at
https://linux.oracle.com/errata/ELSA-2019-4838.html

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running UEKR3 3.8.13 on
OL6 and OL7 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-2019-11135: Side-channel information leak in Intel TSX.

A side-channel information leak on some generations of Intel processors
could allow the leaking of internal microarchitectural buffers during
asynchronous aborts in a TSX transaction.  For CPUs that are vulnerable
to Microarchitectural Data Sampling, existing mitigations cover
CVE-2019-11135, for newer CPUs with hardware fixes for MDS, TSX is
transparently disabled.  On these newer CPUs, TSX functionality can be
restored by writing 0 to /sys/kernel/debug/x86/tsx_force_abort.

Orabug: 30419232

SUPPORT

Ksplice support is available at ksplice-support_ww at oracle.com.