BugZero | F5 BugID 858609 - TMM crash on hypervisors that use MHDAG or DAGv2 h...

F5 - Defect ID: 858609

TMM crash on hypervisors that use MHDAG or DAGv2 hashes

F5 - Defect ID: 858609

TMM crash on hypervisors that use MHDAG or DAGv2 hashes

Last updated on July 18th, 2026

BugZero Risk Score
6.0 Medium

Overall: 6.0

Severity: 6.4

Community: 4.2

Lifecycle: 7.8

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Bug Details

Priority: 4-Minor
Status: Test
Impact Category: TMOS

Description

Symptoms

A BIG-IP v11.2.1 guest is generating a TMM core on hypervisors that use MHDAG or DAGv2 hashes. This can be checked using the `tmctl -d blade tmm/daglib` command.

Impact

Traffic disrupted while tmm restarts.

Conditions

-- Guest version is 11.2.1 -- Hypervisors use MHDAG or DAGv2 hashes.

Workaround

Upgrade the guest software.

Fix Information

None

Change history

Links

Original Vendor Announcement

Relevant Products

Click on a version to see all relevant bugs

Affected versions: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, 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, 15.1.10.8, 16.0.0, 16.0.0.1, 16.0.1, 16.0.1.1, 16.0.1.2

Fixed versions: No known fixed versions

Relevant Products

Click on a version to see all relevant bugs

Fixed versions: No known fixed versions

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F5 - Defect ID: 858609

TMM crash on hypervisors that use MHDAG or DAGv2 hashes

F5 - Defect ID: 858609

TMM crash on hypervisors that use MHDAG or DAGv2 hashes

Last updated on July 18th, 2026

BugZero Risk Score6.0 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

F5 - Defect ID: 858609

TMM crash on hypervisors that use MHDAG or DAGv2 hashes

F5 - Defect ID: 858609

TMM crash on hypervisors that use MHDAG or DAGv2 hashes

Last updated on July 18th, 2026

BugZero Risk Score6.0 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

BugZero Risk Score
6.0 Medium

BugZero Risk Score
6.0 Medium