Bug ID 723061: Possible tmm core during high load, or when an ASM policy is enabled by other modules

Last Modified: Feb 25, 2023

Bug Tracker

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

Known Affected Versions:, 14.0.1,,,,,, 14.0.0,,

Fixed In:
14.1.0, 13.1.5

Opened: Jun 05, 2018
Severity: 2-Critical


TMM may crash if other modules enable ASM conditionally (e.g., 'ASM::enable' in an iRule) or if the BIG-IP system is under heavy memory load.


Traffic disrupted while tmm restarts.


-- DoSL7 profile or Bot Defense profile is attached to a virtual server. Along with either of the following: -- The BIG-IP system is experiencing high load (low memory). -- An ASM policy is enabled by another module or configuration, such as an APM Access policy or an ASM::enable iRule command.


Do not use 'ASM::enable' (or similar) to enable an ASM policy, when using DoSL7 or Bot Defense profiles attached to virtual servers.

Fix Information

No tmm core occurs during high load or when an ASM policy is enabled by other modules

Behavior Change