Multiple memory corruption issues were addressed with improved memory handling. This issue affected versions prior to iOS 11.3, tvOS 11.3, watchOS 4.3, Safari 11.1, iTunes 12.7.4 for Windows, iCloud for Windows 7.4.
https://support.apple.com/kb/HT208693
https://support.apple.com/kb/HT208695
https://support.apple.com/kb/HT208696
https://support.apple.com/kb/HT208697
https://support.apple.com/kb/HT208698
Source: MITRE
Published: 2019-04-03
Updated: 2019-04-04
Type: CWE-119
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: 8.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 2.8
Severity: HIGH