Kernel security update: Virtuozzo ReadyKernel patch 70.0 for Virtuozzo 7.0.8 and 7.0.8 HF1

Issue date: 2019-01-24

Applies to: Virtuozzo 7.0

Virtuozzo Advisory ID: VZA-2019-001

1. Overview

The cumulative Virtuozzo ReadyKernel patch was updated with security and stability fixes. The patch applies to Virtuozzo kernels 3.10.0-862.9.1.vz7.63.3 (7.0.8) and 3.10.0-862.11.6.vz7.64.7 (7.0.8 HF1).

2. Security Fixes

  • [Moderate] A flaw was found in the implementation of ebtables in the Linux kernel. A local attacker in a container could exploit it to consume large amounts of memory, eventually causing denial of service on the host. (PSBM-90803)

  • [Low] vhost: kernel crash (access out of bounds) in memcpy_fromiovecend(). (PSBM-90291)

3. Bug Fixes

  • tcache was not shrunk in some situations. (PSBM-89403)

  • Kernel crash (access out of bounds) in SyS_mincore(). (PSBM-90329)

4. Installing the Update

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