A total of 23 vulnerabilities were addressed in iOS 13.3.1 and iPadOS 13.3.1, now rolling out for iPhone 6s and later, iPad Air 2 and later, iPad mini 4 and later, and iPod touch 7th generation.
The flaws impact components such as Audio, FaceTime, ImageIO, IOAcceleratorFamily, IPSec, Kernel, libxpc, Mail, Messages, Phone, Safari Login AutoFill, Screenshots, and wifivelocityd.
Successful exploitation of most of these issues could result in arbitrary code execution with kernel or system privileges, Apple explains in its advisory.