Bug ID 540568: TMM core due to SIGSEGV

Last Modified: Jan 29, 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, 11.6.0, 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

Fixed In:
13.0.0, 12.0.0 HF3, 11.6.1, 11.5.4 HF2

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