Kernel security update: Virtuozzo ReadyKernel patch 70.1 for Virtuozzo 7.0.4 HF3 and 7.0.5¶
Issue date: 2019-01-24
Applies to: Virtuozzo 7.0
Virtuozzo Advisory ID: VZA-2019-003
1. Overview¶
The cumulative Virtuozzo ReadyKernel patch was updated with security and stability fixes. The patch applies to Virtuozzo kernels 3.10.0-514.16.1.vz7.30.15 (7.0.4 HF3) and 3.10.0-514.26.1.vz7.33.22 (7.0.5). NOTE: No more patches are planned for kernel 3.10.0-514.16.1.vz7.30.15, support for which ends with this update.
2. Security Fixes¶
[Moderate] A flaw was found in the implementation of ebtables in the Linux kernel. A local attacker in a container could exploit it to consume large amounts of memory, eventually causing denial of service on the host. (PSBM-90803)
3. Bug Fixes¶
Kernel crash (access out of bounds) in SyS_mincore(). (PSBM-90329)
If the CPUs in the system supported memory protection keys for userspace (X86_FEATURE_PKU) but the kernel did not, resuming a container could fail. (PSBM-90828)
4. Installing the Update¶
Download, install, and immediately apply the patch to the current kernel by running ‘readykernel update’.
5. References¶
https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-30.15-70.1-1.vl7/
https://readykernel.com/patch/Virtuozzo-7/readykernel-patch-33.22-70.1-1.vl7/
The JSON file with the list of new and updated packages is available at https://docs.virtuozzo.com/vza/VZA-2019-003.json.