CVE-2019-6594: F5 BIG-IP Access Policy Manager

Medium severity, CVSS 5.9. EPSS: 1% chance of exploitation in the next 30 days.

On BIG-IP 11.5.1-11.6.3.2, 12.1.3.4-12.1.3.7, 13.0.0 HF1-13.1.1.1, and 14.0.0-14.0.0.2, Multi-Path TCP (MPTCP) does not protect against multiple zero length DATA_FINs in the reassembly queue, which can lead to an infinite loop in some circumstances.

Affected products

F5 BIG-IP Access Policy Manager: from 11.5.3, up to and including 11.6.3.2; from 12.1.3.4, up to and including 12.1.3.7; from 13.0.1, up to and including 13.1.1.1; from 14.0.0, up to and including 14.0.0.2; version 13.0.0 only; from 11.5.1, up to and including 11.6.3.2; …
F5 BIG-IP Advanced Firewall Manager: from 11.5.1, up to and including 11.6.3.2; from 12.1.3.4, up to and including 12.1.3.7; from 13.0.1, up to and including 13.1.1.1; from 14.0.0, up to and including 14.0.0.2; version 13.0.0 only
F5 BIG-IP Analytics: from 11.5.1, up to and including 11.6.3.2; from 12.1.3.4, up to and including 12.1.3.7; from 13.0.1, up to and including 13.1.1.1; from 14.0.0, up to and including 14.0.0.2; version 13.0.0 only
F5 BIG-IP Application Security Manager: from 11.5.1, up to and including 11.6.3.2; from 12.1.3.4, up to and including 12.1.3.7; from 13.0.1, up to and including 13.1.1.1; from 14.0.0, up to and including 14.0.0.2; version 13.0.0 only
F5 BIG-IP Domain Name System: from 11.5.1, up to and including 11.6.3.2; from 12.1.3.4, up to and including 12.1.3.7; from 13.0.1, up to and including 13.1.1.1; from 14.0.0, up to and including 14.0.0.2; version 13.0.0 only
F5 BIG-IP Edge Gateway: from 11.5.1, up to and including 11.6.3.2; from 12.1.3.4, up to and including 12.1.3.7; from 13.0.1, up to and including 13.1.1.1; from 14.0.0, up to and including 14.0.0.2; version 13.0.0 only
F5 BIG-IP Fraud Protection Service: from 11.5.1, up to and including 11.6.3.2; from 12.1.3.4, up to and including 12.1.3.7; from 13.0.1, up to and including 13.1.1.1; from 14.0.0, up to and including 14.0.0.2; version 13.0.0 only
F5 BIG-IP Global Traffic Manager: from 11.5.1, up to and including 11.6.3.2; from 12.1.3.4, up to and including 12.1.3.7; from 13.0.1, up to and including 13.1.1.1; from 14.0.0, up to and including 14.0.0.2; version 13.0.0 only
F5 BIG-IP Link Controller: from 11.5.1, up to and including 11.6.3.2; from 12.1.3.4, up to and including 12.1.3.7; from 13.0.1, up to and including 13.1.1.1; from 14.0.0, up to and including 14.0.0.2; version 13.0.0 only
F5 BIG-IP Local Traffic Manager: from 11.5.1, up to and including 11.6.3.2; from 12.1.3.4, up to and including 12.1.3.7; from 13.0.1, up to and including 13.1.1.1; from 14.0.0, up to and including 14.0.0.2; version 13.0.0 only
F5 BIG-IP Policy Enforcement Manager: from 11.5.1, up to and including 11.6.3.2; from 12.1.3.4, up to and including 12.1.3.7; from 13.0.1, up to and including 13.1.1.1; from 14.0.0, up to and including 14.0.0.2; version 13.0.0 only
F5 BIG-IP Webaccelerator: from 11.5.1, up to and including 11.6.3.2; from 12.1.3.4, up to and including 12.1.3.7; from 13.0.1, up to and including 13.1.1.1; from 14.0.0, up to and including 14.0.0.2; version 13.0.0 only

Published 2019-02-26. Last modified 2026-06-17.