BugZero | F5 BugID 815001 - TMM Crash with inbound traffic during high availab...

F5 - Defect ID: 815001

TMM Crash with inbound traffic during high availability (HA) failover

F5 - Defect ID: 815001

TMM Crash with inbound traffic during high availability (HA) failover

Last updated on July 18th, 2026

BugZero Risk Score
8.6 High

Overall: 8.6

Severity: 9.1

Community: 4.2

Lifecycle: 8.3

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Bug Details

Priority: 2-Critical
Status: Verified
Impact Category: Carrier-Grade NAT

Description

Symptoms

New standby device's tmm crashes and generates a core after high availability (HA) failover.

Impact

New standby device's tmm may crash. Traffic disrupted while tmm restarts.

Conditions

1. Enable inbound mode Endpoint Independent Filtering (EIF) in the source translation object. 2. Outbound traffic hits the source translation creating inbound entries. 3. Inbound traffic matches the inbound entry, and this connection stays alive. 4. high availability (HA) failover occurs. 5. Inbound connection closes, and the connection free comes from the BIG-IP system.

Workaround

None.

Fix Information

TMM no longer crashes with inbound traffic during high availability (HA) failover.

Change history

Links

Original Vendor Announcement

Relevant Products

Click on a version to see all relevant bugs

Affected versions:13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3, 13.1.0.4, 13.1.0.5, 13.1.0.6, 13.1.0.7, 13.1.0.8, 13.1.1, 13.1.1.2, 13.1.1.3, 13.1.1.4, 13.1.1.5, 13.1.3, 13.1.3.1, 13.1.3.2, 13.1.3.3, 13.1.3.4, 13.1.3.5, 13.1.3.6, 13.1.4, 13.1.4.1, 13.1.5, 13.1.5.1, 14.0.0, 14.0.0.1, 14.0.0.2, 14.0.0.3, 14.0.0.4, 14.0.0.5, 14.0.1, 14.0.1.1, 14.1.0, 14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.5, 14.1.0.6, 14.1.2, 14.1.2.1, 14.1.2.2, 14.1.2.3, 14.1.2.4, 14.1.2.5, 14.1.2.6, 14.1.2.7, 14.1.2.8, 14.1.3, 15.0.0, 15.0.1, 15.0.1.1, 15.0.1.2, 15.0.1.3, 15.0.1.4

Fixed versions: 15.1.0, 14.1.3.1

Relevant Products

Click on a version to see all relevant bugs

Fixed versions: 15.1.0, 14.1.3.1

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F5 - Defect ID: 815001

TMM Crash with inbound traffic during high availability (HA) failover

F5 - Defect ID: 815001

TMM Crash with inbound traffic during high availability (HA) failover

Last updated on July 18th, 2026

BugZero Risk Score8.6 High

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

F5 - Defect ID: 815001

TMM Crash with inbound traffic during high availability (HA) failover

F5 - Defect ID: 815001

TMM Crash with inbound traffic during high availability (HA) failover

Last updated on July 18th, 2026

BugZero Risk Score8.6 High

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

BugZero Risk Score
8.6 High

BugZero Risk Score
8.6 High