[Important] [Security] Virtuozzo ReadyKernel Patch 156.4 for Virtuozzo Hybrid Server 7.5

Issue date: 2023-05-23

Applies to: Virtuozzo Hybrid Server 7.5

Virtuozzo Advisory ID: VZA-2023-015

1. Overview

The cumulative Virtuozzo ReadyKernel patch was updated with security fixes. The patch applies to all supported kernels of Virtuozzo Hybrid Server 7.5.

2. Security Fixes

  • [Important] [3.10.0-1160.41.1.vz7.183.5 to 3.10.0-1160.80.1.vz7.191.4] Handle case where the lookup of a directory but the file exists. (CVE-2022-24448)

  • [Important] [3.10.0-1160.41.1.vz7.183.5 to 3.10.0-1160.80.1.vz7.191.4] A NULL pointer dereference in a net SLIP driver. (CVE-2022-41858)

  • [Important] [3.10.0-1160.41.1.vz7.183.5 to 3.10.0-1160.80.1.vz7.191.4] A double-free in the net vhost driver error path. (CVE-2023-1838)

  • [Important] [3.10.0-1160.41.1.vz7.183.5 to 3.10.0-1160.80.1.vz7.191.4] A use-after-free when routing an IGMP multicast message. (CVE-2022-20141)

  • [Important] [3.10.0-1160.41.1.vz7.183.5 to 3.10.0-1160.80.1.vz7.191.4] A memory leak in the net queue scheduler cls_u32 error handler. (CVE-2022-29581)

3. Installing the Update

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