Bug ID 591117: APM ACL construction may cause TMM to core if TMM is out of memory

Last Modified: Jul 18, 2026

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

Known Affected Versions:
11.5.4, 11.5.4 hf1, 11.5.4 hf2, 11.5.4 hf3, 11.5.4 hf4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10, 11.6.0, 11.6.0 hf1, 11.6.0 hf2, 11.6.0 hf3, 11.6.0 hf4, 11.6.0 hf5, 11.6.0 hf6, 11.6.0 hf7, 11.6.0 hf8, 11.6.1, 11.6.1 hf1, 11.6.1 hf2, 11.6.2, 11.6.2 hf1, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 11.6.5, 11.6.5.1, 11.6.5.2, 11.6.5.3

Fixed In:
13.0.0, 12.1.2

Opened: May 04, 2016

Severity: 2-Critical

Symptoms

During ACL construction, TMM send queries regarding assigned ACL information. If the reply message contains error message of out-of-memory, TMM was not handling this error message properly, and cause TMM to core.

Impact

Traffic disrupted while tmm restarts.

Conditions

BIG-IP is extremely loaded and out of memory.

Workaround

None

Fix Information

When handling the error reply message of out-of-memory during ACL construction, TMM can handle it without causing TMM to crash.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips