Kernel security update: CVE-2017-18017; Virtuozzo ReadyKernel patch 42.0 for Virtuozzo 7.0.4, 7.0.4 HF3, 7.0.5, 7.0.6, and 7.0.6 HF3

The cumulative Virtuozzo ReadyKernel patch was updated with a security fix. The patch applies to Virtuozzo kernels 3.10.0-514.16.1.vz7.30.10 (Virtuozzo 7.0.4), 3.10.0-514.16.1.vz7.30.15 (Virtuozzo 7.0.4 HF3), 3.10.0-514.26.1.vz7.33.22 (Virtuozzo 7.0.5), 3.10.0-693.1.1.vz7.37.30 (Virtuozzo 7.0.6), and 3.10.0-693.11.6.vz7.40.4 (Virtuozzo 7.0.6 HF3).
Vulnerability id: CVE-2017-18017
If the system uses iptables and there are iptables rules with TCPMSS action there, a remote attacker could cause a denial of service (use-after-free in tcpmss_mangle_packet function leading to memory corruption) or possibly have unspecified other impact by sending specially crafted network packets.