Bug ID 1110205: SSL::collect in CLIENTSSL_DATA prevents orderly connection shutdown

Last Modified: May 29, 2024

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
17.1.0, 17.0.0,,, 16.1.2, 15.1.8, 15.1.7,, 15.1.6,, 15.1.5,

Fixed In:
17.1.0,, 15.1.9

Opened: May 27, 2022

Severity: 2-Critical


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

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips