Last Modified: Apr 28, 2025
Affected Product(s):
BIG-IP APM, LTM
Known Affected Versions:
11.3.0, 11.4.1, 11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.1 HF10, 11.5.1 HF11, 11.5.2, 11.5.2 HF1, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4
Fixed In:
12.0.0, 11.6.0 HF5, 11.5.3
Opened: Apr 10, 2014 Severity: 3-Major Related Article:
K16370
In certain rare circumstances using L4 forwarding and TSO, the MSS sizes on client and server sides in combination with internal processing can cause an internal mismatch resulting in a TMM crash.
This issue causes a failover or TMM outage.
This applies only when using L4 forwarding virtuals with TSO; additional exact external conditions are still under investigation.
This issue has no workaround at this time.
TMM will properly handle cases when the MSS sizes would have led to underflow.