An information leakage vulnerability was reported in the TCG TPM 2.0 reference code that could allow a local attacker with elevated privileges to obtain a credential from a TPM-aware CA for a falsified TPM key (such as an Attestation Key, DevID Key or TLS authentication key) and falsify other TPM 2.0 attestations with this key. See also TCG VRT0010.
https://trustedcomputinggroup.org/wp-content/uploads/VRT0010-Advisory_Final-1.pdf
https://trustedcomputinggroup.org/wp-content/uploads/Extended-vrt0010-11-guidance_V1.pdf
https://trustedcomputinggroup.org/resource/errata-for-tpm-library-specification-2-0/