Question 1

What is the EOL Risk Score for Red Hat OpenShift 4.21?

Accepted Answer

Red Hat OpenShift 4.21 has an EOL Risk Score™ of 10 out of 100, placing it in the Low risk band. The score is calculated from four factors: EOL Recency (0/40), Attack Surface (10/30), CISA KEV Exposure (0/20), and Extended Support Availability (0/10).

Question 2

Is Red Hat OpenShift 4.21 still supported?

Accepted Answer

Red Hat OpenShift 4.21 is currently supported. End of life is scheduled for August 3, 2027. Plan your migration before that date to avoid security risk.

Question 3

When does Red Hat OpenShift 4.21 reach end of life?

Accepted Answer

Red Hat OpenShift 4.21 reached (or will reach) end of life on August 3, 2027. After this date, no security patches or bug fixes are issued by the vendor.

Question 4

What are the security risks of running Red Hat OpenShift 4.21 after end of life?

Accepted Answer

After end of life, Red Hat OpenShift 4.21 no longer receives security patches. Any newly discovered CVEs remain unpatched indefinitely. Organizations running EOL software also face compliance violations under SOC 2, PCI DSS, HIPAA, and ISO 27001, which require use of supported software versions.