CVE-2017-6166: F5 BIG-IP Afm

Medium severity, CVSS 5.9. EPSS: 1.9% chance of exploitation in the next 30 days.

In BIG-IP LTM, AAM, AFM, Analytics, APM, ASM, DNS, Link Controller, PEM, and WebSafe software 12.0.0 to 12.1.1, in some cases the Traffic Management Microkernel (TMM) may crash when processing fragmented packets. This vulnerability affects TMM through a virtual server configured with a FastL4 profile. Traffic processing is disrupted while TMM restarts. If the affected BIG-IP system is configured as part of a device group, it will trigger a failover to the peer device.

Affected products

• F5 BIG-IP Afm: from 12.0.0, up to and including 12.1.1
• F5 BIG-IP Analytics: from 12.0.0, up to and including 12.1.1
• F5 BIG-IP APM: from 12.0.0, up to and including 12.1.1
• F5 BIG-IP Application Acceleration Manager: from 12.0.0, up to and including 12.1.1
• F5 BIG-IP Asm: from 12.0.0, up to and including 12.1.1
• F5 BIG-IP DNS: from 12.0.0, up to and including 12.1.1
• F5 BIG-IP Link Controller: from 12.0.0, up to and including 12.1.1
• F5 BIG-IP Ltm: from 12.0.0, up to and including 12.1.1
• F5 BIG-IP Pem: from 12.0.0, up to and including 12.1.1
• F5 f5 Websafe: from 12.0.0, up to and including 12.1.1
• F5 Linerate: from 2.5.0, up to and including 2.6.2

Published 2017-11-22. Last modified 2026-06-17.