Last Modified: Aug 19, 2026
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
11.5.1, 11.5.1 hf1, 11.5.1 hf2, 11.5.1 hf3, 11.5.1 hf4, 11.5.1 hf5, 11.5.1 hf6, 11.5.1 hf7, 11.5.1 hf8, 11.5.1 hf9, 11.5.1 hf10, 11.5.1 hf11, 11.5.2, 11.5.2 hf1, 11.5.3, 11.5.3 hf1, 11.5.3 hf2, 11.5.4, 11.5.4 hf1, 11.5.4 hf2, 11.5.4 hf3, 11.5.4 hf4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10
Opened: Feb 19, 2014 Severity: 2-Critical
Rarely LB::prime iRule with SIP filter can result in a tmm core due the flow control mechanism added in the SIP hudfilter and the fact that LB::prime, adds necessary count of prime messages in Q and calls mblb_connect synchronously which has the potential to traverse the entire serverside chain.
Rarely results in a core with LB::prime iRule. Traffic disrupted while tmm restarts.
LB::prime iRule with SIP filter is used.
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