Bug ID 473396: TCP Segmented Offload (TSO) can leak header xfrag in some circumstances

Last Modified: Apr 28, 2025

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4

Fixed In:
11.6.0, 11.5.1 HF5

Opened: Jul 29, 2014

Severity: 2-Critical

Related Article: K15941

Symptoms

In some circumstances, TSO can leak xfrags containing packet headers.

Impact

TMM memory usage grows over time, eventually resulting in TMM crashing due to lack of memory.

Conditions

In some circumstances, TSO can leak xfrags containing packet headers.

Workaround

Disable TSO.

Fix Information

TSO no longer leaks xfrags.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips