BugZero | F5 BugID 936441 - Nitrox5 SDK driver logging messages

F5 - Defect ID: 936441

Nitrox5 SDK driver logging messages

F5 - Defect ID: 936441

Nitrox5 SDK driver logging messages

Last updated on July 18th, 2026

BugZero Risk Score
6.9 Medium

Overall: 6.9

Severity: 7.3

Community: 4.2

Lifecycle: 8.3

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Bug Details

Priority: 3-Major
Status: Verified
Impact Category: Local Traffic Manager

Description

Symptoms

The system kernel started spontaneously logging messages at an extremely high rate (~3000 per second): Warning kernel: EMU(3)_INT: 0x0000000000000020 warning kernel: sum_sbe: 0 warning kernel: sum_dbe: 0 warning kernel: sum_wd: 0 warning kernel: sum_gi: 0 warning kernel: sum_ge: 0 warning kernel: sum_uc: 1 The above set of messages seems to be logged at about 2900-3000 times a second. These messages continue after TMM fails its heartbeat and is killed. The system is rebooted by the host watchdog.

Impact

High rate of logging messages. The tmm heartbeat eventually fails, and tmm is restarted. Traffic disrupted while tmm restarts.

Conditions

These messages are triggered by Nitrox5 driver when EMU microcode cache errors corrected by hardware.

Workaround

None.

Fix Information

None

Change history

Links

Original Vendor Announcement

Relevant Products

Click on a version to see all relevant bugs

Affected versions: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, 13.0.0, 13.0.0 hf1, 13.0.0 hf2, 13.0.0 hf3, 13.0.1, 13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3, 13.1.0.4, 13.1.0.5, 13.1.0.6, 13.1.0.7, 13.1.0.8, 13.1.1, 13.1.1.2, 13.1.1.3, 13.1.1.4, 13.1.1.5, 13.1.3, 13.1.3.1, 13.1.3.2, 13.1.3.3, 13.1.3.4, 13.1.3.5, 13.1.3.6, 13.1.4, 13.1.4.1, 13.1.5, 13.1.5.1, 14.0.0, 14.0.0.1, 14.0.0.2, 14.0.0.3, 14.0.0.4, 14.0.0.5, 14.0.1, 14.0.1.1, 14.1.0, 14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.5, 14.1.0.6, 14.1.2, 14.1.2.1, 14.1.2.2, 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, 15.0.0, 15.0.1, 15.0.1.1, 15.0.1.2, 15.0.1.3, 15.0.1.4, 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, 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

Fixed versions: 17.0.0, 16.1.2.2, 15.1.5.1, 14.1.5

Relevant Products

Click on a version to see all relevant bugs

Fixed versions: 17.0.0, 16.1.2.2, 15.1.5.1, 14.1.5

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F5 - Defect ID: 936441

Nitrox5 SDK driver logging messages

F5 - Defect ID: 936441

Nitrox5 SDK driver logging messages

Last updated on July 18th, 2026

BugZero Risk Score6.9 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

F5 - Defect ID: 936441

Nitrox5 SDK driver logging messages

F5 - Defect ID: 936441

Nitrox5 SDK driver logging messages

Last updated on July 18th, 2026

BugZero Risk Score6.9 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

BugZero Risk Score
6.9 Medium

BugZero Risk Score
6.9 Medium