USB Audio Class 1.0 Code 10/no-audio issue fully resolved in KB5127648 and Windows 11 26H2?

Your concern is specifically the remaining Code 10/no-audio failures, rather than the multichannel symptom already fixed. Microsoft's documentation still makes that distinction: KB5129195 and later updates address the 8-channel/3D-audio behavior, while the other symptoms remain under investigation.

The KB5127648 article still lists USB Audio Class 1.0 startup failures, no output and unresponsive controls as a partially resolved known issue. Windows Release Health continues to mark it Mitigated and includes Windows 11 26H2 among affected platforms. Therefore, those documents do not establish KB5127648 or 26H2 as a complete fix, and they provide no final-fix KB or date for changing the status to Resolved.

For approval, pilot the affected device models on the target build and record hardware IDs, driver versions and symptoms. Microsoft directs IT administrators needing a workaround for unresolved symptoms to Support for Business. Use that case for deployment-specific guidance rather than assuming the feature upgrade resolves it.