It gets worse. ICP-Brasil, the AC mentioned in the bug reports, the the government run agency responsible for all things related to digital signatures. Digitally signing a contract, a deed, accessing tax returns…
Unlike web browsers, digital signature use cases should perform revocation checks, so revoking the google.com certificate should solve that.
CAA records rely on the CAs to respect them, and this is an article about how a CA has issued a cert in violation of a CAA record.