A use after free issue was addressed with improved memory management. This issue affected versions prior to iOS 12, macOS Mojave 10.14, tvOS 12, watchOS 5, iTunes 12.9 for Windows, iCloud for Windows 7.7.
https://support.apple.com/kb/HT209106
https://support.apple.com/kb/HT209107
https://support.apple.com/kb/HT209108
https://support.apple.com/kb/HT209139
Source: MITRE
Published: 2019-04-03
Updated: 2019-04-05
Type: CWE-416
Base Score: 6.8
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 8.6
Severity: MEDIUM
Base Score: 7.8
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 1.8
Severity: HIGH