A memory corruption issue was addressed with improved validation. This issue affected versions prior to iOS 12, macOS Mojave 10.14, tvOS 12, watchOS 5.
https://support.apple.com/kb/HT209106
https://support.apple.com/kb/HT209107
https://support.apple.com/kb/HT209108
Source: MITRE
Published: 2019-04-03
Updated: 2019-04-05
Type: CWE-119
Base Score: 6.5
Vector: AV:N/AC:L/Au:S/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 8
Severity: MEDIUM
Base Score: 8.8
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 2.8
Severity: HIGH