Bug ID 540568: TMM core due to SIGSEGV

Last Modified: Aug 19, 2026

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

Known Affected Versions:
11.5.3, 11.5.3 hf1, 11.5.3 hf2, 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, 12.0.0, 12.0.0 hf1, 12.0.0 hf2, 12.0.0 hf3, 12.0.0 hf4

Fixed In:
13.0.0, 11.6.1

Opened: Aug 18, 2015

Severity: 2-Critical

Symptoms

TMM may core due to a SIGSEGV.

Impact

Traffic disrupted while tmm restarts.

Conditions

Occurs rarely. Specific conditions unknown.

Workaround

None.

Fix Information

Fixed an intermittent tmm core related to Bug 540571.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips