Last Modified: Aug 19, 2026
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
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, 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
Fixed In:
11.6.2
Opened: Dec 19, 2016 Severity: 2-Critical Related Article:
K50166002
IP tuple nexthop object can be freed while still referenced by another structure.
The BIG-IP system might crash. This is a very timing/memory-usage dependent issue that is rarely encountered.
This can happen if LSN is in use and the proxy connection takes some time to complete, creating a large enough time window where the nexthop object might be freed.
None.
Management of IP tuple nexthop object reference counting is more consistent.