BugZero | F5 BugID 500897 - TMM may restart when the 'clientside' or 'serversi...

F5 - Defect ID: 500897

TMM may restart when the 'clientside' or 'serverside' iRule commands are used

F5 - Defect ID: 500897

TMM may restart when the 'clientside' or 'serverside' iRule commands are used

Last updated on July 18th, 2026

BugZero Risk Score
6.8 Medium

Overall: 6.8

Severity: 7.3

Community: 4.2

Lifecycle: 7.8

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Bug Details

Priority: 3-Major
Status: Test
Impact Category: Local Traffic Manager
Views: 1

Description

Symptoms

Any parking iRule command used inside clientside or serverside iRule crashes TMM.

Impact

Traffic disrupted while tmm restarts.

Conditions

A virtual server references an iRule that uses a parking iRule command (such as table or after), within the clientside or serverside iRule command.

Workaround

Move the command outside the clientside or serverside iRule command.

Fix Information

TMM no longer crashes when an iRule executes a parking command inside a 'clientside' or 'serverside' context-switching command.

Change history

Links

Original Vendor Announcement

Relevant Products

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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, 11.5.2, 11.5.2 hf1, 11.6.0, 11.6.0 hf1, 11.6.0 hf2, 11.6.0 hf3, 11.6.0 hf4, 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 versions: 12.0.0, 11.5.3

Relevant Products

Click on a version to see all relevant bugs

Fixed versions: 12.0.0, 11.5.3

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F5 - Defect ID: 500897

TMM may restart when the 'clientside' or 'serverside' iRule commands are used

F5 - Defect ID: 500897

TMM may restart when the 'clientside' or 'serverside' iRule commands are used

Last updated on July 18th, 2026

BugZero Risk Score6.8 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

F5 - Defect ID: 500897

TMM may restart when the 'clientside' or 'serverside' iRule commands are used

F5 - Defect ID: 500897

TMM may restart when the 'clientside' or 'serverside' iRule commands are used

Last updated on July 18th, 2026

BugZero Risk Score6.8 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

BugZero Risk Score
6.8 Medium

BugZero Risk Score
6.8 Medium