BugZero | F5 BugID 657883 - tmm cache resolver should not cache response with ...

F5 - Defect ID: 657883

tmm cache resolver should not cache response with TTL=0

F5 - Defect ID: 657883

tmm cache resolver should not cache response with TTL=0

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

tmm cache resolver caches responses with TTL=0, and it shouldn't.

Impact

tmm cache resolver caches responses with TTL=0.

Conditions

TTL is set to 0 on the BIG-IP DNS system, so TMM will see TTL=0 from the DNS answer.

Workaround

None.

Fix Information

The system no longer caches ttl=0 response for tmm cache resolver. This is correct behavior.

Change history

Links

Original Vendor Announcement

Relevant Products

Click on a version to see all relevant bugs

Affected versions:11.5.4, 11.5.4 hf1, 11.5.4 hf2, 11.5.4 hf3, 11.5.4 hf4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 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, 12.0.0, 12.0.0 hf1, 12.0.0 hf2, 12.0.0 hf3, 12.0.0 hf4, 12.1.0, 12.1.0 hf1, 12.1.0 hf2, 12.1.1, 12.1.1 hf1, 12.1.1 hf2, 12.1.2, 12.1.2 hf1, 12.1.2 hf2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 13.0.0, 13.0.0 hf1, 13.0.0 hf2, 13.0.0 hf3, 13.0.1

Fixed versions: 13.1.0, 12.1.3.6, 11.6.4, 11.5.9

Relevant Products

Click on a version to see all relevant bugs

Fixed versions: 13.1.0, 12.1.3.6, 11.6.4, 11.5.9

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F5 - Defect ID: 657883

tmm cache resolver should not cache response with TTL=0

F5 - Defect ID: 657883

tmm cache resolver should not cache response with TTL=0

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: 657883

tmm cache resolver should not cache response with TTL=0

F5 - Defect ID: 657883

tmm cache resolver should not cache response with TTL=0

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