Important kernel security update: Virtuozzo ReadyKernel patch 68.2 for Virtuozzo 7.0.4 HF3 to 7.0.8 HF1

Issue date: 2018-12-17

Applies to: Virtuozzo 7.0

Virtuozzo Advisory ID: VZA-2018-088

1. Overview

The cumulative Virtuozzo ReadyKernel patch was updated with a security fix. The patch applies to all supported Virtuozzo kernels.

2. Security Fixes

  • [Important] Transforming an IPv6 socket to an IPv4 and then transforming it back to a listening socket could result in a kernel memory corruption. An unprivileged user on the host or in a container could exploit this to crash the kernel. (CVE-2018-9568)

3. Installing the Update

Download, install, and immediately apply the patch to the current kernel by running ‘readykernel update’.