Kernel security update: Virtuozzo ReadyKernel patch 67.0 for Virtuozzo 7.0.8 and 7.0.8 HF1

Issue date: 2018-11-30

Applies to: Virtuozzo 7.0

Virtuozzo Advisory ID: VZA-2018-085

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] The Linux kernel was found to be vulnerable to a NULL pointer dereference bug in the __netlink_ns_capable() function in the net/netlink/af_netlink.c file. A local attacker could exploit this when a net namespace with a netnsid is assigned to cause a kernel panic and a denial of service. (CVE-2018-14646)

3. Bug Fixes

  • It was discovered that a special sequence of operations involving NFS server in a container with FEATURES=’nfsd=on’ could crash the host kernel. (PSBM-90024)

  • Asynchronous discard requests could fail with EIO because ploop did not properly align them. (PSBM-90052)

4. Installing the Update

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