BugZero | F5 BugID 2220285 - Modifying iRule proc with ILX::call may result in ...

F5 - Defect ID: 2220285

Modifying iRule proc with ILX::call may result in tmm crash

F5 - Defect ID: 2220285

Modifying iRule proc with ILX::call may result in tmm crash

Last updated on July 28th, 2026

BugZero Risk Score
8.7 High

Overall: 8.7

Severity: 9.1

Community: 4.2

Lifecycle: 10.0

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Bug Details

Priority: 2-Critical
Status: Resolved
Impact Category: Local Traffic Manager

Description

Symptoms

TMM may crash if the iRule Proc with ILX::call is renamed or deleted while the iRule is in use.

Impact

Traffic disrupted while tmm restarts.

Conditions

1. ILX::call is within irule proc 2. iRule proc is either renamed or deleted while the iRule is in use.

Workaround

None

Fix Information

None

Change history

Links

Original Vendor Announcement

Relevant Products

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Affected versions:16.0.0, 16.0.0.1, 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, 16.1.4, 16.1.4.1, 16.1.4.2, 16.1.4.3, 16.1.5, 16.1.5.1, 16.1.5.2, 16.1.6, 16.1.6.1, 17.5.0, 17.5.1, 17.5.1.2, 17.5.1.3, 17.5.1.4, 17.5.1.5, 17.5.1.6, 21.0.0, 21.0.0.1, 21.0.0.2, 21.0.0.3

Fixed versions: 17.5.1.8

Relevant Products

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Fixed versions: 17.5.1.8

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F5 - Defect ID: 2220285

Modifying iRule proc with ILX::call may result in tmm crash

F5 - Defect ID: 2220285

Modifying iRule proc with ILX::call may result in tmm crash

Last updated on July 28th, 2026

BugZero Risk Score8.7 High

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

F5 - Defect ID: 2220285

Modifying iRule proc with ILX::call may result in tmm crash

F5 - Defect ID: 2220285

Modifying iRule proc with ILX::call may result in tmm crash

Last updated on July 28th, 2026

BugZero Risk Score8.7 High

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

BugZero Risk Score
8.7 High

BugZero Risk Score
8.7 High