Apple today released the official version of iOS 12.4.1, a month away from the release of iOS 12.4. You can upgrade by going to Settings – General – Software Update. This time, Apple releases iOS 12.4.1 to fix a serious vulnerability.
After the release of iOS 12.4, the jailbreak community found that the vulnerabilities that have been fixed in iOS 12.3 were reopened unexpectedly, which also caused the iOS 12.4 jailbreak software to be released directly.
Impact: A malicious application may be able to execute arbitrary code with system privileges
Description: A use after free issue was addressed with improved memory management.
CVE-2019-8605: Ned Williamson working with Google Project Zero