A remote code execution vulnerability exists in the way that the ChakraCore scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability." This affects Microsoft Edge, ChakraCore. This CVE ID is unique from CVE-2018-8354, CVE-2018-8391, CVE-2018-8457, CVE-2018-8459.
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8456