[El-errata] New Ksplice updates for RHCK 7 (ELSA-2019-3979)

[Errata Announcements for Oracle Linux]

Synopsis: ELSA-2019-3979 can now be patched using Ksplice
CVEs: CVE-2019-14821 CVE-2019-15239

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Linux Security Advisory, ELSA-2019-3979.
More information about this errata can be found at
https://linux.oracle.com/errata/ELSA-2019-3979.html

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running RHCK 7 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-2019-14821: Denial-of-service in KVM MMIO coalesced writes.

An out-of-bounds access to the coalesced MMIO ring buffer could result
in a kernel crash.  A malicious guest could use this flaw to crash the
hypervisor or potentially, escalate privileges.


* Improved fix for CVE-2019-15239: Use-after-free in TCP write queue 
purge path.

A failure to properly zero out pointers to freed memory in the
tcp_write_queue_purge function can lead to a use-after-free scenario.
This could potentially cause a system to exhibit unexpected behavior,
and could lead to a denial-of-service.

SUPPORT

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