BugZero | F5 BugID 511130 - TMM core due to invalid memory access while handli...

F5 - Defect ID: 511130

TMM core due to invalid memory access while handling CMP acknowledgement

F5 - Defect ID: 511130

TMM core due to invalid memory access while handling CMP acknowledgement

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: Not Verified
Impact Category: Local Traffic Manager

Description

Symptoms

Rarely, TMM might core due to invalid memory access while handling a CMP acknowledgement.

Impact

Traffic disrupted while tmm restarts.

Conditions

Memory is not validated before handling a CMP acknowledgement.

Workaround

None.

Fix Information

Memory is now validated before handling a CMP acknowledgement.

Change history

Links

Original Vendor Announcement

Relevant Products

Click on a version to see all relevant bugs

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: 511130

TMM core due to invalid memory access while handling CMP acknowledgement

F5 - Defect ID: 511130

TMM core due to invalid memory access while handling CMP acknowledgement

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: 511130

TMM core due to invalid memory access while handling CMP acknowledgement

F5 - Defect ID: 511130

TMM core due to invalid memory access while handling CMP acknowledgement

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