BugZero | F5 BugID 1048425 - Packet tester crashes TMM when vlan external sourc...

F5 - Defect ID: 1048425

Packet tester crashes TMM when vlan external source-checking is enabled

F5 - Defect ID: 1048425

Packet tester crashes TMM when vlan external source-checking is enabled

Last updated on July 18th, 2026

BugZero Risk Score
8.6 High

Overall: 8.6

Severity: 9.1

Community: 4.2

Lifecycle: 8.7

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Bug Details

Priority: 2-Critical
Status: Resolved
Impact Category: Advanced Firewall Manager

Description

Symptoms

TMM SIGFPE Core Assertion "packet must already have an ethernet header".

Impact

Traffic disrupted while tmm restarts.

Conditions

Run the AFM Packet Tracer when external source-checking is enabled on the VLAN.

Workaround

Disable source checking on the vlan.

Fix Information

TMM no longer crashes when utilizing the AFM Packet Tracer tool.

Change history

Links

Original Vendor Announcement

Relevant Products

Click on a version to see all relevant bugs

Affected versions:14.1.4, 14.1.4.1, 14.1.4.2, 14.1.4.3, 14.1.4.4, 14.1.4.5, 14.1.4.6, 14.1.5, 14.1.5.1, 14.1.5.2, 14.1.5.3, 14.1.5.4, 14.1.5.6, 15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4, 15.1.0.5, 15.1.1, 15.1.2, 15.1.2.1, 15.1.3, 15.1.3.1, 15.1.4, 15.1.4.1, 15.1.5, 15.1.5.1, 15.1.6, 15.1.6.1, 15.1.7, 15.1.8, 15.1.8.1, 15.1.8.2, 15.1.9, 15.1.9.1, 15.1.10, 15.1.10.2, 15.1.10.3, 15.1.10.4, 15.1.10.5, 15.1.10.6, 15.1.10.7, 16.0.1, 16.0.1.1, 16.0.1.2, 16.1.0, 16.1.1, 16.1.2, 16.1.2.1, 16.1.2.2, 16.1.3, 16.1.3.1, 16.1.3.2, 16.1.3.3, 16.1.3.4, 16.1.3.5, 17.0.0, 17.0.0.1, 17.0.0.2, 17.1.0, 17.1.0.1, 17.1.0.2, 17.1.0.3, 17.1.1, 17.1.1.1, 17.1.1.2, 17.1.1.3, 17.1.1.4

Fixed versions: 17.5.0, 17.1.2, 16.1.4, 15.1.10.8

Relevant Products

Click on a version to see all relevant bugs

Fixed versions: 17.5.0, 17.1.2, 16.1.4, 15.1.10.8

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F5 - Defect ID: 1048425

Packet tester crashes TMM when vlan external source-checking is enabled

F5 - Defect ID: 1048425

Packet tester crashes TMM when vlan external source-checking is enabled

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: 1048425

Packet tester crashes TMM when vlan external source-checking is enabled

F5 - Defect ID: 1048425

Packet tester crashes TMM when vlan external source-checking is enabled

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