Kernel security update: CVE-2017-12193; Virtuozzo ReadyKernel patch 37.1 for Virtuozzo 7.0.0, 7.0.1, 7.0.3, 7.0.4, and 7.0.4 HF3

Issue date: 2017-11-10

Applies to: Virtuozzo 7.0

Virtuozzo Advisory ID: VZA-2017-101

1. Overview

The cumulative Virtuozzo ReadyKernel patch was updated with security and stability fixes. The patch applies to Virtuozzo kernels 3.10.0-327.18.2.vz7.15.2 (Virtuozzo 7.0.0), 3.10.0-327.37.1.vz7.18.7 (Virtuozzo 7.0.1), 3.10.0-327.37.1.vz7.20.18 (Virtuozzo 7.0.3), 3.10.0-514.16.1.vz7.30.10 (Virtuozzo 7.0.4), and 3.10.0-514.16.1.vz7.30.15 (Virtuozzo 7.0.4 HF3).

2. Security Fixes

  • [Moderate] A flaw was found in the implementation of associative arrays in the Linux kernel. A null pointer dereference could happen in assoc_array_apply_edit() due to incorrect node splitting. (CVE-2017-12193)

3. Bug Fixes

  • sysinfo() returns 0 for uptime if called from a VZ7 container. (PSBM-62094)

  • Each resize issues invalidate_inode_pages2(), which triggers ultra slow synchronous writeback of all dirty pages. (PSBM-76437)

4. Installing the Update

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