Last Modified: Feb 06, 2026
Affected Product(s):
BIG-IP Install/Upgrade, LTM
Known Affected Versions:
17.5.0, 17.5.1, 17.5.1.2, 17.5.1.3, 17.5.1.4, 21.0.0, 21.0.0.1
Opened: Jul 14, 2025 Severity: 2-Critical
TMM crashes due to data corruption caused by xnet-DPDK. This can occur after upgrading from version 17.5.0 to version 17.5.1.
Traffic disrupted while tmm restarts.
1) Using xnet-DPDK driver 2) DPDK v20.11 is being used (BIG-IP v17.5.x or higher)
Two possible workarounds here: 1. Disable TSO globally: tmsh modify sys db tm.tcpsegmentationoffload value disable 2. Switch to the sock driver: https://my.f5.com/manage/s/article/K000153024
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