Here’s the deifintion and explanation of the CCC:
**"2148 ***Blasphemy *is directly opposed to the second commandment. It consists in uttering against God - inwardly or outwardly - words of hatred, reproach, or defiance; in speaking ill of God; in failing in respect toward him in one’s speech; in misusing God’s name. St. James condemns those “who blaspheme that honorable name [of Jesus] by which you are called.” The prohibition of blasphemy extends to language against Christ’s Church, the saints, and sacred things. It is also blasphemous to make use of God’s name to cover up criminal practices, to reduce peoples to servitude, to torture persons or put them to death. The misuse of God’s name to commit a crime can provoke others to repudiate religion.
Blasphemy is contrary to the respect due God and his holy name. It is in itself a grave sin."
Even though this isn’t directly worded as “Blasphemy against the Holy Spirit”, ultimately, all Blashphemy by deifinition is directed against God and the Holy Spirit by extension. Hope this helps. Thanks and God Bless.