BugZero | F5 BugID 974881 - Tmm crash with SNAT iRule configured with few supp...

F5 - Defect ID: 974881

Tmm crash with SNAT iRule configured with few supported/unsupported events with diameter traffic

F5 - Defect ID: 974881

Tmm crash with SNAT iRule configured with few supported/unsupported events with diameter traffic

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: Service Provider

Description

Symptoms

Currently, for diameter, a SNAT iRule can be configured with MR_INGRESS and MR_FAILED events. Certain events can cause tmm to crash.

Impact

Traffic disrupted while tmm restarts.

Conditions

A SNAT iRule is configured with the events CLIENT_ACCEPTED, DIAMETER_INGRESS and DIAMETER_EGRESS for diameter

Workaround

None

Fix Information

Fixed a tmm crash related to handling certain events in an iRule.

Change history

Links

Original Vendor Announcement

Relevant Products

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Affected versions: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, 14.1.3.1, 14.1.4, 14.1.4.1, 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, 16.0.0, 16.0.0.1, 16.0.1, 16.0.1.1

Fixed versions: 16.1.0, 16.0.1.2, 15.1.4, 14.1.4.2

Relevant Products

Click on a version to see all relevant bugs

Fixed versions: 16.1.0, 16.0.1.2, 15.1.4, 14.1.4.2

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F5 - Defect ID: 974881

Tmm crash with SNAT iRule configured with few supported/unsupported events with diameter traffic

F5 - Defect ID: 974881

Tmm crash with SNAT iRule configured with few supported/unsupported events with diameter traffic

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: 974881

Tmm crash with SNAT iRule configured with few supported/unsupported events with diameter traffic

F5 - Defect ID: 974881

Tmm crash with SNAT iRule configured with few supported/unsupported events with diameter traffic

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