Bug ID 1153989: SSL::collect in CLIENTSSL_DATA prevents orderly connection shutdown

Last Modified: Nov 25, 2022

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(all modules)

Known Affected Versions:
15.1.0,,,,,, 15.1.1, 15.1.2,, 15.1.3,, 15.1.4,, 15.1.5,, 15.1.6,, 15.1.7, 15.1.8, 16.1.0, 16.1.1, 16.1.2,,, 16.1.3, 17.0.0,

Fixed In:

Opened: Sep 12, 2022
Severity: 3-Major


If a virtual server has an iRule performing SSL payload processing in CLIENTSSL_DATA, TMM fails to process or forward an ingress TCP FIN from a client, leaving the connection in a zombie state until it eventually idles out.


Unexpected growth in the number of connections idling on a virtual server leads to memory pressure.


The issue occurs only when SSL::collect is used in CLIENTSSL_DATA when CLIENTSSL_DATA { log local0. "." SSL::release SSL::collect }



Fix Information


Behavior Change