What does NTSTATUS 0xC00001A6 (STATUS_DUPLICATE_PRIVILEGES) mean?

 
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STATUS_INVALID_EXCEPTION_HANDLER STATUS_NOT_ALLOWED_ON_SYSTEM_FILE

STATUS_DUPLICATE_PRIVILEGES

The token privilege list is malformed by duplication

This status is a structural validation result for privilege data. Windows expects a privilege list to contain each privilege once; duplicates make the requested token adjustment or security operation ambiguous.

It is different from lacking a privilege. The problem is the caller-supplied privilege array or policy data, not the security authority refusing the requested right.

What to inspect

  • Inspect the TOKEN_PRIVILEGES buffer or equivalent privilege list before the call.
  • Deduplicate privilege LUIDs before adjusting or creating token state.
  • Log both the textual privilege names and resolved LUIDs because aliases or repeated conversion can hide duplicates.

References


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