CVE-2019-19921: Canonical Ubuntu Linux

High severity, CVSS 7.0. EPSS: 0.4% chance of exploitation in the next 30 days.

runc through 1.0.0-rc9 has Incorrect Access Control leading to Escalation of Privileges, related to libcontainer/rootfs_linux.go. To exploit this, an attacker must be able to spawn two containers with custom volume-mount configurations, and be able to run custom images. (This vulnerability does not affect Docker due to an implementation detail that happens to block the attack.)

Affected products

• Canonical Ubuntu Linux: version 18.04 only; version 19.10 only
• Debian Debian Linux: version 9.0 only; version 10.0 only
• Linuxfoundation Runc: up to and including 0.1.1; version 1.0.0 only
• Opensuse Leap: version 15.1 only
• Red Hat Openshift Container Platform: version 4.1 only; version 4.2 only

Published 2020-02-12. Last modified 2026-06-17.