[Ksplice][Ubuntu-18.04-Updates] New Ksplice updates for Ubuntu 18.04 Bionic (USN-4255-1)

[Gregory Herrero]

Synopsis: USN-4255-1 can now be patched using Ksplice
CVEs: CVE-2019-14615 CVE-2020-7053

Systems running Ubuntu 18.04 Bionic can now use Ksplice to patch
against the latest Ubuntu Security Notice, USN-4255-1.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running Ubuntu 18.04
Bionic 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-2020-7053: Use-after-free when destroying i915 GEM context.

A locking error when destroying GEM context in the i915 graphic driver
could lead to a use-after-free. A local attacker could use this flaw to
cause a denial-of-service.


* CVE-2019-14615: Information leak in Intel i915 generation 9 devices.

Missing pipeline flushing when switching i915 contexts could lead to
information leaks between unrelated GPU contexts. A malicious user
could potentially use this to obtain sensitive information.

SUPPORT

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