CVE-2018-11806: Canonical Ubuntu Linux

High severity, CVSS 8.2. EPSS: 0.8% chance of exploitation in the next 30 days.

m_cat in slirp/mbuf.c in Qemu has a heap-based buffer overflow via incoming fragmented datagrams.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only; version 18.04 only; version 18.10 only
• Debian Debian Linux: version 8.0 only; version 9.0 only
• Qemu Qemu: up to and including 2.12.1
• Red Hat Enterprise Linux Desktop: version 6.0 only; version 7.0 only
• Red Hat Enterprise Linux Eus: version 7.5 only; version 7.6 only; version 7.7 only
• Red Hat Enterprise Linux Server: version 6.0 only; version 7.0 only
• Red Hat Enterprise Linux Server Aus: version 7.6 only; version 7.7 only
• Red Hat Enterprise Linux Server Tus: version 7.6 only; version 7.7 only
• Red Hat Enterprise Linux Workstation: version 6.0 only; version 7.0 only
• Red Hat Openstack: version 8 only; version 9 only; version 10 only; version 12 only; version 13 only
• Red Hat Virtualization: version 4.0 only

Published 2018-06-13. Last modified 2026-06-17.