Last Modified: Oct 20, 2026
Affected Product(s):
BIG-IP ASM, LTM
Known Affected Versions:
17.5.0, 17.5.1, 17.5.1.2, 17.5.1.3, 17.5.1.4, 17.5.1.5, 17.5.1.6, 17.5.1.8, 17.5.1.9, 17.5.1.10, 21.1.0, 21.1.0.1, 21.1.0.2, 21.1.0.3
Opened: Oct 08, 2026 Severity: 3-Major
If there is packet loss on the network, applications that use smaller send buffers may experience a tcp socket hang. This has been observed on ASM ICAP traffic.
Under certain conditions ICAP data may stop being sent to the ICAP server.
-- Traffic emanating from the BIG-IP Linux host -- ASM ICAP
Delete the affected / stalled connections via tmsh Disable GSO (generic-segmentation-offload) on the vlan towards the ICAP servers.
None