BugZero | F5 BugID 1773441 - Standby device memory growth over a period of time...

F5 - Defect ID: 1773441

Standby device memory growth over a period of time with full-proxy mirrored connection

F5 - Defect ID: 1773441

Standby device memory growth over a period of time with full-proxy mirrored connection

Last updated on July 28th, 2026

BugZero Risk Score
6.9 Medium

Overall: 6.9

Severity: 7.3

Community: 4.2

Lifecycle: 8.7

What is the BugZero Risk Score?

F5 Integration

Learn more about where this data comes from

F5 Integration

Learn more

BugZero Plan

Streamline upgrades with automated vendor bug scrubs

BugZero Plan

Learn more

BugZero Prevent

Wish you caught this bug sooner? Get proactive today.

BugZero Prevent

Learn more

Bug Details

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

Description

Symptoms

Memory utilization increases on the standby device for long-lived mirrored connections. The aggressive sweeper may be invoked.

Impact

Standby device may show memory growth over time.

Conditions

HA pair with full proxy connection mirroring that is using TCP profile and Selective Acknowledgment (SACK) enabled

Workaround

Use fastL4 virtual server configuration if it is compatible.

Fix Information

None

Change history

Top F5 Defects

9.6Defect ID: 546260
TMM can crash if using the v6rd profile
9.6Defect ID: 934133
Unable to Create/delete ltm virtual server via CLI transaction when destination is not specified on the ltm virtual object
9.6Defect ID: 1154417
Profile based attack is not mitigated at hardware on L2 wire setup
9.6Defect ID: 913713
Rebooting a blade causes MCPd to core as it rejoins the cluster
9.6Defect ID: 2141125
Multicast traffic is dropped with incorrect VLAN tagging

F5 Integration

Learn more about where this data comes from

F5 Integration

Learn more

BugZero Plan

Streamline upgrades with automated vendor bug scrubs

BugZero Plan

Learn more

BugZero Prevent

Wish you caught this bug sooner? Get proactive today.

BugZero Prevent

Learn more

Ready to prevent the next vendor outage?

Get a demo

F5 - Defect ID: 1773441

Standby device memory growth over a period of time with full-proxy mirrored connection

F5 - Defect ID: 1773441

Standby device memory growth over a period of time with full-proxy mirrored connection

Last updated on July 28th, 2026

BugZero Risk Score
6.9 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

F5 - Defect ID: 1773441

Standby device memory growth over a period of time with full-proxy mirrored connection

F5 - Defect ID: 1773441

Standby device memory growth over a period of time with full-proxy mirrored connection

Last updated on July 28th, 2026

BugZero Risk Score
6.9 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

F5 - Defect ID: 1773441

Standby device memory growth over a period of time with full-proxy mirrored connection

F5 - Defect ID: 1773441

Standby device memory growth over a period of time with full-proxy mirrored connection

Last updated on July 28th, 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: 1773441

Standby device memory growth over a period of time with full-proxy mirrored connection

F5 - Defect ID: 1773441

Standby device memory growth over a period of time with full-proxy mirrored connection

Last updated on July 28th, 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