Bug ID 475231

Bug ID 475231: TCP::close in CLIENTSSL_CLIENTCERT iRule event may result in tmm crash

Last Modified: Jan 07, 2026

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

Known Affected Versions:
11.5.1, 11.5.1 HF1, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4

Fixed In:
12.0.0, 11.6.0 HF5, 11.5.1 HF5

Opened: Aug 11, 2014

Severity: 2-Critical

TCP::close in CLIENTSSL_CLIENTCERT iRule event may cause tmm to crash.

Traffic disrupted while tmm restarts.

This occurs when TCP::close is called within a CLIENTSSL_CLIENTCERT iRule event.

Do not use TCP::close in CLIENTSSL_CLIENTCERT iRule event

Connection remains open after dispatching CLIENTSSL_CLIENTCERT iRule event, which prevents accessing invalid memory.