BugZero | F5 BugID 1078669 - iRule command “RESOLVER::name

F5 - Defect ID: 1078669

iRule command “RESOLVER::name_lookup” returns null for TCP resolver with TC (truncated) flag set.

F5 - Defect ID: 1078669

iRule command “RESOLVER::name_lookup” returns null for TCP resolver with TC (truncated) flag set.

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: Global Traffic Manager (DNS)

Description

Symptoms

“RESOLVER::name_lookup” returns null for TCP resolver with TC set.

Impact

iRule command does not give any response but with TC set.

Conditions

Backend server returns very large DNS response.

Workaround

N/A

Fix Information

N/A

Change history

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F5 - Defect ID: 1078669

iRule command “RESOLVER::name_lookup” returns null for TCP resolver with TC (truncated) flag set.

F5 - Defect ID: 1078669

iRule command “RESOLVER::name_lookup” returns null for TCP resolver with TC (truncated) flag set.

Last updated on July 18th, 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: 1078669

iRule command “RESOLVER::name_lookup” returns null for TCP resolver with TC (truncated) flag set.

F5 - Defect ID: 1078669

iRule command “RESOLVER::name_lookup” returns null for TCP resolver with TC (truncated) flag set.

Last updated on July 18th, 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: 1078669

iRule command “RESOLVER::name_lookup” returns null for TCP resolver with TC (truncated) flag set.

F5 - Defect ID: 1078669

iRule command “RESOLVER::name_lookup” returns null for TCP resolver with TC (truncated) flag set.

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: 1078669

iRule command “RESOLVER::name_lookup” returns null for TCP resolver with TC (truncated) flag set.

F5 - Defect ID: 1078669

iRule command “RESOLVER::name_lookup” returns null for TCP resolver with TC (truncated) flag set.

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