CVE-2018-5379: Canonical Ubuntu Linux

Critical severity, CVSS 9.8. EPSS: 38.5% chance of exploitation in the next 30 days.

The Quagga BGP daemon (bgpd) prior to version 1.2.3 can double-free memory when processing certain forms of UPDATE message, containing cluster-list and/or unknown attributes. A successful attack could cause a denial of service or potentially allow an attacker to execute arbitrary code.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only; version 17.10 only
• Debian Debian Linux: version 7.0 only; version 8.0 only; version 9.0 only
• Quagga Quagga: up to and including 1.2.2
• Red Hat Enterprise Linux Server: version 7.0 only
• Red Hat Enterprise Linux Server Aus: version 7.4 only; version 7.6 only
• Red Hat Enterprise Linux Server Eus: version 7.4 only; version 7.5 only; version 7.6 only
• Red Hat Enterprise Linux Server Tus: version 7.4 only; version 7.6 only
• Red Hat Enterprise Linux Workstation: version 7.0 only
• Siemens Ruggedcom Rox Ii Firmware: before 2.13.0 (fixed in 2.13.0)

Published 2018-02-19. Last modified 2026-06-17.