Bug ID 437627: TMM may crash if fastl4 vs has fragmeneted pkt

Last Modified: Aug 19, 2026

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

Known Affected Versions:
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, 11.6.0, 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, 11.6.2, 11.6.2 hf1, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 11.6.5, 11.6.5.1, 11.6.5.2, 11.6.5.3

Fixed In:
12.0.0, 11.5.2

Opened: Nov 12, 2013

Severity: 3-Major

Related Article: K17155

Symptoms

TMM may crash if a fast L4 profile has a fragmented packet

Impact

Traffic disrupted while tmm restarts.

Conditions

fastl4 configure incoming fragmented packets

Workaround

In fast L4 profile, enable option "Reassemble IP Fragments"

Fix Information

Improved handling of a fragmented packet that could cause a crash if using a fastL4 profile.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips