CVE-2019-13132: Canonical Ubuntu Linux

Critical severity, CVSS 9.8. EPSS: 42.5% chance of exploitation in the next 30 days.

In ZeroMQ libzmq before 4.0.9, 4.1.x before 4.1.7, and 4.2.x before 4.3.2, a remote, unauthenticated client connecting to a libzmq application, running with a socket listening with CURVE encryption/authentication enabled, may cause a stack overflow and overwrite the stack with arbitrary data, due to a buffer overflow in the library. Users running public servers with the above configuration are highly encouraged to upgrade as soon as possible, as there are no known mitigations.

Affected products

• Canonical Ubuntu Linux: version 16.04 only; version 18.04 only; version 18.10 only; version 19.04 only
• Debian Debian Linux: version 8.0 only; version 9.0 only
• Fedoraproject Fedora: version 29 only; version 30 only; version 31 only
• Zeromq Libzmq: before 4.0.9 (fixed in 4.0.9); from 4.1.0, before 4.1.7 (fixed in 4.1.7); from 4.2.0, before 4.3.2 (fixed in 4.3.2)

Published 2019-07-10. Last modified 2026-06-17.