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

Last Modified: Sep 08, 2026

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, 16.1.6.1, 17.0.0, 17.0.0.1, 17.0.0.2, 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, 17.1.3.1, 17.1.3.2, 17.1.3.4, 17.1.3.5, 17.5.0, 17.5.1, 17.5.1.2, 17.5.1.3, 17.5.1.4, 17.5.1.5, 17.5.1.6, 17.5.1.8, 17.5.1.9, 21.0.0, 21.0.0.1, 21.0.0.2, 21.0.0.3

Opened: Aug 08, 2025

Severity: 3-Major

Symptoms

tmm/cmp queue_drops stat will start incrementing. Sometimes leaks, e.g., in SSL handshakes

Impact

Memory leaks and traffic not handled properly

Conditions

- This is a general problem that happens when one TMM thread has to communicate with another TMM thread, but the sender sends faster than the receiver can handle - One place where this can cause issues is when SSL is used with OCSP, and there is a lot of that traffic (how much depends on how fast the box TMM is running on and on what else the TMM threads are doing)

Workaround

None

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips