Bug ID 1988981: TMM crashes after detaching and reattaching a DoS profile on the DNS virtual server

Last Modified: Oct 15, 2025

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

Known Affected Versions:
17.1.1, 17.1.1.1, 17.1.1.2, 17.1.1.3, 17.1.1.4, 17.1.2, 17.1.2.1, 17.1.2.2, 17.1.3

Opened: Jul 18, 2025

Severity: 3-Major

Symptoms

-- TMM stops functioning and crashes. -- A core dump file is generated on the system.

Impact

Traffic disrupted while tmm restarts.

Conditions

During an ongoing DDoS attack, the DoS profile associated with a virtual server is detached, modified, and then reattached.

Workaround

Avoid detaching, modifying, or reattaching the DoS profile to the virtual server while the BIG-IP is actively detecting or mitigating a DDoS attack, if possible.

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips