I have no idea if that is the case here, but it is completely normal that some vulnerabilities have a set disclosure date to allow for coordinated responses. Yo

I have no idea if that is the case here, but it is completely normal that some vulnerabilities have a set disclosure date to allow for coordinated responses. You can either get the information early but under non-disclosure, or along with everyone else. Most people play by these rules (with a few notable exceptions).