CVE-2013-4327: Canonical Ubuntu Linux

Medium severity, CVSS 6.9. EPSS: 0.3% chance of exploitation in the next 30 days.

systemd does not properly use D-Bus for communication with a polkit authority, which allows local users to bypass intended access restrictions by leveraging a PolkitUnixProcess PolkitSubject race condition via a (1) setuid process or (2) pkexec process, a related issue to CVE-2013-4288.

Affected products

• Canonical Ubuntu Linux: version 13.04 only
• Debian Debian Linux: version 7.0 only
• Systemd Project Systemd: up to and including 207

Published 2013-10-03. Last modified 2026-06-16.