A remote code execution vulnerability exists in Microsoft browsers in the way JavaScript scripting engines handle objects in memory, aka "Scripting Engine Memory Corruption Vulnerability." This CVE ID is unique from CVE-2017-0224, CVE-2017-0228, CVE-2017-0229, CVE-2017-0230, CVE-2017-0234, CVE-2017-0235, and CVE-2017-0236.
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0238