BugZero | F5 BugID 850193 - Microsoft Hyper-V hv_netvsc driver unevenly utiliz...

F5 - Defect ID: 850193

Microsoft Hyper-V hv_netvsc driver unevenly utilizing vmbus_channel queues

F5 - Defect ID: 850193

Microsoft Hyper-V hv_netvsc driver unevenly utilizing vmbus_channel queues

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: TMOS

Description

Symptoms

-- Uneven unic channel distribution and transmit errors (tx_errcnt) seen in /proc/unic. -- Packet loss and increased retransmissions under load.

Impact

-- Reduced throughput. -- Packet loss and increased retransmissions under load.

Conditions

BIG-IP Virtual Edition (VE) in Hyper-V or Azure Cloud.

Workaround

None.

Fix Information

None

Change history

Links

Original Vendor Announcement

Relevant Products

Click on a version to see all relevant bugs

Affected versions: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, 15.1.2, 15.1.2.1, 15.1.3, 15.1.3.1

Fixed versions: 16.0.0, 15.1.4, 14.1.4.4

Relevant Products

Click on a version to see all relevant bugs

Fixed versions: 16.0.0, 15.1.4, 14.1.4.4

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F5 - Defect ID: 850193

Microsoft Hyper-V hv_netvsc driver unevenly utilizing vmbus_channel queues

F5 - Defect ID: 850193

Microsoft Hyper-V hv_netvsc driver unevenly utilizing vmbus_channel queues

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: 850193

Microsoft Hyper-V hv_netvsc driver unevenly utilizing vmbus_channel queues

F5 - Defect ID: 850193

Microsoft Hyper-V hv_netvsc driver unevenly utilizing vmbus_channel queues

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