Bug ID 643396: Using FLOW_INIT iRule may lead to TMM memory leak or crash

Last Modified: Sep 13, 2023

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

Known Affected Versions:

Fixed In:
13.1.0, 13.0.0 HF1, 12.1.2 HF1

Opened: Feb 06, 2017

Severity: 2-Critical

Related Article: K34553627


Memory leak in TMM or even crash may be observed if using FLOW_INIT event in iRules.


TMM memory leak or crash. Traffic disrupted while tmm restarts.


iRule triggered by FLOW_INIT event is in use. Note: The leak is difficult to observe, and the crash requires specific steps, so encountering this issue is relatively uncommon.



Fix Information

Fixed a memory leak in the FLOW_INIT iRule event.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips