Bug ID 1928261: TMM Crashes Due To Memory Corruption Typically Following A Restart

Last Modified: Jul 28, 2026

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

Known Affected Versions:
17.1.2, 17.1.2.1, 17.1.2.2, 17.1.3, 17.1.3.1, 17.1.3.2, 17.1.3.4, 17.5.1.6, 21.1.0

Fixed In:
21.1.0.1, 21.0.0.3, 17.5.1.8

Opened: Apr 17, 2025

Severity: 2-Critical

Symptoms

Memory corruptions cause TMM or other daemons to crash

Impact

TMM crashes, disrupting traffic

Conditions

- F5OS tenant running on r2xxx or r4xxx platforms - Usually occurs after tmm is restarted to provision a different module, a license renewal, or changing the provision.extramb

Workaround

None

Fix Information

The memory corruption issue has been identified and resolved.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips