Bug ID 2014597: Async session db ops are missing flow control

Last Modified: Oct 15, 2025

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

Known Affected Versions:
16.1.0, 16.1.1, 16.1.2, 16.1.2.1, 16.1.2.2, 16.1.3, 16.1.3.1, 16.1.3.2, 16.1.3.3, 16.1.3.4, 16.1.3.5, 16.1.4, 16.1.4.1, 16.1.4.2, 16.1.4.3, 16.1.5, 16.1.5.1, 16.1.5.2, 16.1.6, 17.1.0, 17.1.0.1, 17.1.0.2, 17.1.0.3, 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, 17.5.0, 17.5.1, 17.5.1.2, 17.5.1.3

Opened: Aug 08, 2025

Severity: 3-Major

Symptoms

Tmm cores when - Memory leakage from SSL handshakes piling up, due to mpi_data_queue getting filled fast and failing to trigger callbacks. - Segmentation fault occurs due to a large delay in callbacks

Impact

TMM crashes

Conditions

- To many requests from one tmm thread to another tmm causes tmm_cmp_enqueue to drop replies as mpi_data_queue gets filled up. - Longer delays in replies are causing drops, as the system is busy, or too many retries are causing the mpi_data_queue to fill up fast.

Workaround

None

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips