Cisco has revamped the way it handles patches moving toward a more predictable schedule.
Under Cisco's new approach it will release patches on the fourth Wednesday of March and September. That sets up the first batch of patches from Cisco on March 28.
This schedule change will not restrict us from promptly publishing an individual IOS security advisory for a serious vulnerability which is publicly disclosed or for which we are aware of active exploitation.
Cisco is adopting this approach in response to extensive feedback from customers, who seek further predictability for support planning and deployment cycles.
The current format of IOS Security Advisories will remain the same. The software table in the advisory includes a list of recommended releases (where possible) for each software train that addresses all of the security vulnerabilities included in the bundle.