BugZero | F5 BugID 599720 - TMM may crash in bigtcp due to null pointer derefe...

F5 - Defect ID: 599720

TMM may crash in bigtcp due to null pointer dereference

F5 - Defect ID: 599720

TMM may crash in bigtcp due to null pointer dereference

Last updated on July 18th, 2026

BugZero Risk Score
8.5 High

Overall: 8.5

Severity: 9.1

Community: 4.2

Lifecycle: 7.8

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Bug Details

Priority: 2-Critical
Status: Not Verified
Impact Category: Local Traffic Manager

Description

Symptoms

TMM crashed in bigtcp_queue_pkt() due to null pointer dereference of clientside flow.

Impact

Traffic disrupted while tmm restarts.

Conditions

This only occurs for serverside flow whose peer no longer exists.

Workaround

No workaround.

Fix Information

A problem of null pointer dereferece in bigtcp has been fixed.

Change history

Links

Original Vendor Announcement

Relevant Products

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Affected versions:11.5.4, 11.5.4 hf1, 11.5.4 hf2, 11.5.4 hf3, 11.5.4 hf4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10, 12.1.1, 12.1.1 hf1, 12.1.1 hf2, 12.1.2, 12.1.2 hf1, 12.1.2 hf2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4, 12.1.4.1, 12.1.5, 12.1.5.1, 12.1.5.2, 12.1.5.3, 12.1.6

Fixed versions: 13.0.0

Relevant Products

Click on a version to see all relevant bugs

Fixed versions: 13.0.0

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F5 - Defect ID: 599720

TMM may crash in bigtcp due to null pointer dereference

F5 - Defect ID: 599720

TMM may crash in bigtcp due to null pointer dereference

Last updated on July 18th, 2026

BugZero Risk Score8.5 High

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

F5 - Defect ID: 599720

TMM may crash in bigtcp due to null pointer dereference

F5 - Defect ID: 599720

TMM may crash in bigtcp due to null pointer dereference

Last updated on July 18th, 2026

BugZero Risk Score8.5 High

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

BugZero Risk Score
8.5 High

BugZero Risk Score
8.5 High