CVE-2018-17963: Canonical Ubuntu Linux

Critical severity, CVSS 9.8. EPSS: 4.7% chance of exploitation in the next 30 days.

qemu_deliver_packet_iov in net/net.c in Qemu accepts packet sizes greater than INT_MAX, which allows attackers to cause a denial of service or possibly have unspecified other impact.

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 3.0.0; version 3.1.0 only
• Red Hat Openstack: version 10 only; version 13 only; version 14 only
• Red Hat Virtualization: version 4.0 only
• Red Hat Virtualization Manager: version 4.3 only

Published 2018-10-09. Last modified 2026-06-17.