Kernel security update: CVE-2017-12193; Virtuozzo ReadyKernel patch 37.1 for Virtuozzo 7.0.5

Issue date: 2017-11-10

Applies to: Virtuozzo 7.0

Virtuozzo Advisory ID: VZA-2017-102

1. Overview

The cumulative Virtuozzo ReadyKernel patch was updated with security and stability fixes. The patch applies to Virtuozzo kernel 3.10.0-514.26.1.vz7.33.22 (Virtuozzo 7.0.5).

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)

  • Kernel crash (NULL pointer dereference) in fuse_dev_alloc(). (PSBM-75073)

  • 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’.