Bug ID 624744: Potential crash in a multi-blade chassis during CMP state changes.

Last Modified: Aug 19, 2026

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

Known Affected Versions:
11.6.1, 11.6.1 hf1, 11.6.1 hf2, 11.6.2, 11.6.2 hf1, 12.0.0, 12.0.0 hf1, 12.0.0 hf2, 12.0.0 hf3, 12.0.0 hf4, 12.1.0, 12.1.0 hf1, 12.1.0 hf2, 12.1.1, 12.1.1 hf1, 12.1.1 hf2, 12.1.2, 12.1.2 hf1, 12.1.2 hf2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4, 12.1.4.1, 12.1.5, 12.1.5.1, 12.1.5.2, 12.1.5.3, 12.1.6

Fixed In:
13.0.0, 11.6.3

Opened: Oct 25, 2016

Severity: 2-Critical

Symptoms

Potential TMM crash resulting in flows being impacted.

Impact

Traffic disrupted while tmm restarts.

Conditions

A multi-blade chassis with PEM needs to undergo a CMP state change with flows on the active blade.

Workaround

None

Fix Information

NULL check has been added prior to calling a callback for asynchronous handling.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips