Oracle provides all customers with the same information in order to protect all customers equally.
These bulletins are be updated on the Tuesday closest to the 17th of the following two months after their release (i.e., the two months between the normal quarterly Critical Patch Update publication dates).
Security Alerts released before 2015 are available here.
Solaris Third Party Bulletins are used to announce security fixes for third party software distributed with Oracle Solaris.
Starting October 20, 2015, Oracle will also publish Oracle Linux Bulletins which list all CVEs that had been resolved and announced in Oracle Linux Security Advisories in the last one month prior to the release of the bulletin.
The Oracle Linux Bulletin will be published on the same day as Oracle Critical Patch Updates are released.