Bug ID 481677: A possible TMM crash in some circumstances.

Last Modified: Apr 28, 2025

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

Known Affected Versions:
11.5.2, 11.5.2 HF1, 11.5.3, 11.5.3 HF1, 11.5.3 HF2, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5

Fixed In:
12.0.0, 11.6.0 HF6, 11.5.4

Opened: Sep 29, 2014

Severity: 2-Critical

Related Article: K16745

Symptoms

If TCP::Close is called during the SSL handshake, the TMM might crash.

Impact

Traffic disrupted while tmm restarts.

Conditions

TCP::close is called during an SSL handshake

Workaround

When closing the connection before or during an SSL/TLS handshake, use the "drop" or "reject" command instead of the TCP::close command.

Fix Information

TMM no longer produces a core file when the TCP::close iRule command is executed during an SSL handshake.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips