CVE-2019-6619: F5 BIG-IP Access Policy Manager

High severity, CVSS 7.5. EPSS: 1.8% chance of exploitation in the next 30 days.

On BIG-IP 14.0.0-14.1.0.1, 13.0.0-13.1.1.4, and 12.1.0-12.1.4, the Traffic Management Microkernel (TMM) may restart when a virtual server has an HTTP/2 profile with Application Layer Protocol Negotiation (ALPN) enabled and it processes traffic where the ALPN extension size is zero.

Affected products

• F5 BIG-IP Access Policy Manager: from 12.1.0, before 12.1.4.1 (fixed in 12.1.4.1); from 13.0.0, before 13.1.1.5 (fixed in 13.1.1.5); from 14.0.0, before 14.1.0.2 (fixed in 14.1.0.2)
• F5 BIG-IP Advanced Firewall Manager: from 12.1.0, before 12.1.4.1 (fixed in 12.1.4.1); from 13.0.0, before 13.1.1.5 (fixed in 13.1.1.5); from 14.0.0, before 14.1.0.2 (fixed in 14.1.0.2)
• F5 BIG-IP Application Acceleration Manager: from 12.1.0, before 12.1.4.1 (fixed in 12.1.4.1); from 13.0.0, before 13.1.1.5 (fixed in 13.1.1.5); from 14.0.0, before 14.1.0.2 (fixed in 14.1.0.2)
• F5 BIG-IP Application Security Manager: from 12.1.0, before 12.1.4.1 (fixed in 12.1.4.1); from 13.0.0, before 13.1.1.5 (fixed in 13.1.1.5); from 14.0.0, before 14.1.0.2 (fixed in 14.1.0.2)
• F5 BIG-IP Link Controller: from 12.1.0, before 12.1.4.1 (fixed in 12.1.4.1); from 13.0.0, before 13.1.1.5 (fixed in 13.1.1.5); from 14.0.0, before 14.1.0.2 (fixed in 14.1.0.2)
• F5 BIG-IP Local Traffic Manager: from 12.1.0, before 12.1.4.1 (fixed in 12.1.4.1); from 13.0.0, before 13.1.1.5 (fixed in 13.1.1.5); from 14.0.0, before 14.1.0.2 (fixed in 14.1.0.2)
• F5 BIG-IP Policy Enforcement Manager: from 12.1.0, before 12.1.4.1 (fixed in 12.1.4.1); from 13.0.0, before 13.1.1.5 (fixed in 13.1.1.5); from 14.0.0, before 14.1.0.2 (fixed in 14.1.0.2)
• F5 BIG-IP Webaccelerator: from 12.1.0, before 12.1.4.1 (fixed in 12.1.4.1); from 13.0.0, before 13.1.1.5 (fixed in 13.1.1.5); from 14.0.0, before 14.1.0.2 (fixed in 14.1.0.2)

Published 2019-05-03. Last modified 2026-06-17.