An out-of-bounds read was addressed with improved bounds checking. 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: 2019-04-04
Type: CWE-125
Base Score: 5
Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N
Impact Score: 2.9
Exploitability Score: 10
Severity: MEDIUM
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Impact Score: 3.6
Exploitability Score: 3.9
Severity: HIGH