CVE-2018-16880: Canonical Ubuntu Linux

High severity, CVSS 7.0. EPSS: 0.6% chance of exploitation in the next 30 days.

A flaw was found in the Linux kernel's handle_rx() function in the [vhost_net] driver. A malicious virtual guest, under specific conditions, can trigger an out-of-bounds write in a kmalloc-8 slab on a virtual host which may lead to a kernel memory corruption and a system panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out. Versions from v4.16 and newer are vulnerable.

Affected products

• Canonical Ubuntu Linux: version 18.04 only; version 18.10 only
• Linux Linux Kernel: from 4.16, before 4.19.20 (fixed in 4.19.20); from 4.20, before 4.20.7 (fixed in 4.20.7)

Published 2019-01-29. Last modified 2026-06-17.