Kernel security update: Virtuozzo ReadyKernel patch 71.0 for Virtuozzo 7.0.6 to 7.0.8 HF1 and Virtuozzo Infrastructure Platform 2.5

The cumulative Virtuozzo ReadyKernel patch was updated with security and stability fixes. The patch applies to Virtuozzo kernels 3.10.0-693.1.1.vz7.37.30 (Virtuozzo 7.0.6) to 3.10.0-862.11.6.vz7.64.7 (Virtuozzo 7.0.8 HF1) and 3.10.0-862.20.2.vz7.73.24 (Virtuozzo Infrastructure Platform 2.5).
Vulnerability id: CVE-2018-18397
A flaw was found in the implementation of userfaultfd. An attacker is able to bypass file permissions on filesystems mounted with tmpfs/hugetlbs to modify a file and possibly disrupt normal system behaviour. At this time there is an understanding there is no crash or priviledge escalation but the impact of modifications on these filesystems of files in production systems may have adverse affects.