CVE-2019-11924: Facebook Fizz

High severity, CVSS 7.5. EPSS: 2.4% chance of exploitation in the next 30 days.

A peer could send empty handshake fragments containing only padding which would be kept in memory until a full handshake was received, resulting in memory exhaustion. This issue affects versions v2019.01.28.00 and above of fizz, until v2019.08.05.00.

Affected products

• Facebook Fizz: from 2019.01.28.00, up to and including 2019.08.05.00

Published 2019-08-20. Last modified 2026-06-17.