CVE-2019-16239: Canonical Ubuntu Linux

Critical severity, CVSS 9.8. EPSS: 3.4% chance of exploitation in the next 30 days.

process_http_response in OpenConnect before 8.05 has a Buffer Overflow when a malicious server uses HTTP chunked encoding with crafted chunk sizes.

Affected products

• Canonical Ubuntu Linux: version 18.04 only
• Debian Debian Linux: version 8.0 only; version 9.0 only; version 10.0 only
• Fedoraproject Fedora: version 29 only; version 30 only; version 31 only
• Infradead Openconnect: before 8.05 (fixed in 8.05)
• Opensuse Leap: version 15.0 only; version 15.1 only

Published 2019-09-17. Last modified 2026-06-17.