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Kernel security update: Virtuozzo ReadyKernel patch 10.0 for kernels 3.10.0-327.18.2.vz7.15.2 (Virtuozzo 7.0.0), 3.10.0-327.36.1.vz7.18.7 (Virtuozzo 7.0.1), and 3.10.0-327.36.1.vz7.20.18 (Virtuozzo 7.0.3)

Issue date: 2017-02-03

Applies to: Virtuozzo 7.0

Virtuozzo Advisory ID: VZA-2017-004

1. Overview

The cumulative Virtuozzo ReadyKernel patch updated with security fixes. The patch applies to Virtuozzo versions 7.0.0, 7.0.1, and 7.0.3.

2. Security Fixes

  • [Moderate] Linux kernel built with the Kernel-based Virtual Machine (CONFIG_KVM) support is vulnerable to an incorrect segment selector(SS) value error. The error could occur while loading values into the SS register in long mode. A user/process inside guest could use this flaw to crash the guest resulting in DoS or potentially escalate their privileges inside guest. (CVE-2017-2583)

  • [Moderate] arch/x86/kvm/emulate.c in the Linux kernel through 4.9.3 allows local users to obtain sensitive information from kernel memory or cause a denial of service (use-after-free) via a crafted application that leverages instruction emulation for fxrstor, fxsave, sgdt, and sidt. (CVE-2017-2584)

3. Installing the Update

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

Nov 18, 2024
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