Last Modified: Aug 19, 2026
Affected Product(s):
BIG-IP All
Known Affected Versions:
11.6.0, 11.6.0 hf1, 11.6.0 hf2, 11.6.0 hf3, 11.6.0 hf4, 11.6.0 hf5, 11.6.0 hf6, 11.6.0 hf7, 11.6.0 hf8, 11.6.1, 11.6.1 hf1, 11.6.1 hf2, 11.6.2, 11.6.2 hf1, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 11.6.5, 11.6.5.1, 11.6.5.2, 11.6.5.3
Fixed In:
12.0.0
Opened: Mar 26, 2015 Severity: 2-Critical Related Article:
K16417
In certain isolated cases, TCP profiles with Early Retransmit and SACK enabled will cause a TMM Crash.
Traffic disrupted while tmm restarts.
The connection is not in fast recovery but a SACK hole has been retransmitted.
Disable Early Retransmit in the TCP profile.
Early retransmit now handles corner cases where the SACK scoreboard is empty.