The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.
The kernel in Apple iOS before 8.4.1 does not properly restrict debugging features, which allows attackers to bypass background-execution limitations via a crafted app.
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* versions up to 8.4 (inclusive)