Important kernel security update: Virtuozzo ReadyKernel patch 69.0 for Virtuozzo 7.0.4 HF3 to 7.0.8 HF1¶

1. Overview¶

The cumulative Virtuozzo ReadyKernel patch was updated with a security fix. The patch applies to all supported Virtuozzo kernels.

2. Security Fixes¶

• [Important] A flaw was found in the implementation of NFS v4.1 in the Linux kernel. NFS v4.1 shares mounted in different network namespaces at the same time can make bc_svc_process() use wrong back-channel ID and cause a use-after-free. A malicious user in a container can exploit this to cause a host kernel memory corruption and a system crash. (CVE-2018-16884)

3. Installing the Update¶

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

4. References¶

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-30.15-69.0-1.vl7/

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-33.22-69.0-1.vl7/

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-37.30-69.0-1.vl7/

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-40.4-69.0-1.vl7/

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-43.10-69.0-1.vl7/

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-46.7-69.0-1.vl7/

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-48.2-69.0-1.vl7/

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-63.3-69.0-1.vl7/

• https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-64.7-69.0-1.vl7/

• https://bugzilla.redhat.com/show_bug.cgi?id=1660375

The JSON file with the list of new and updated packages is available at https://docs.virtuozzo.com/vza/VZA-2018-089.json.