CVE-2018-16864: Canonical Ubuntu Linux

High severity, CVSS 7.8. EPSS: 0.7% chance of exploitation in the next 30 days.

An allocation of memory without limits, that could result in the stack clashing with another memory region, was discovered in systemd-journald when a program with long command line arguments calls syslog. A local attacker may use this flaw to crash systemd-journald or escalate his privileges. Versions through v240 are vulnerable.

Affected products

• Canonical Ubuntu Linux: version 16.04 only; version 18.04 only; version 18.10 only
• Debian Debian Linux: version 8.0 only; version 9.0 only
• Oracle Communications Session Border Controller: version 8.0.0 only; version 8.1.0 only; version 8.2.0 only
• Oracle Enterprise Communications Broker: version 3.0.0 only; version 3.1.0 only
• Red Hat Enterprise Linux Desktop: version 7.0 only
• Red Hat Enterprise Linux Server: version 7.0 only; version 7.4 only; version 7.5 only; version 7.6 only
• Red Hat Enterprise Linux Server Aus: version 7.3 only; version 7.6 only
• Red Hat Enterprise Linux Server Eus: version 7.4 only; version 7.6 only
• Red Hat Enterprise Linux Server Tus: version 7.3 only; version 7.6 only
• Red Hat Enterprise Linux Workstation: version 7.0 only
• Systemd Project Systemd: up to and including 240

Published 2019-01-11. Last modified 2026-06-17.