[Ksplice][Ubuntu-16.04-Updates] New Ksplice updates for Ubuntu 16.04 Xenial (USN-4916-2)

[Oracle Ksplice]

Synopsis: USN-4916-2 can now be patched using Ksplice
CVEs: CVE-2021-3493

Systems running Ubuntu 16.04 Xenial can now use Ksplice to patch
against the latest Ubuntu Security Notice, USN-4916-2.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running Ubuntu 16.04
Xenial 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

* Improved update to CVE-2021-3493: Elevation of privileges in overlayfs file system.

A flaw in overlayfs file system implementation could result in failure
to properly validate the application of file system capabilities with
respect to user namespaces. A local attacker could use this flaw to gain
elevated privileges.

SUPPORT

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