A type confusion issue was addressed with improved memory handling. This issue is fixed in iOS 12.1.3, macOS Mojave 10.14.3, tvOS 12.1.2, watchOS 5.1.3. A malicious application may be able to break out of its sandbox.
http://www.securityfocus.com/bid/106739
https://support.apple.com/HT209443
https://support.apple.com/HT209446
https://support.apple.com/HT209447
Source: MITRE
Published: 2019-03-05
Updated: 2020-08-24
Type: CWE-843
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: 8.6
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Impact Score: 6
Exploitability Score: 1.8
Severity: HIGH