CVE-2023-21823: Microsoft Windows Graphic Component Privilege Escalation Vulnerability

Vulnerability summary

CVE-2023-21823 is a high (CVSS 7.8) Integer Overflow or Wraparound vulnerability in Microsoft Windows. It is known to be exploited: CISA lists it, first on 14-02-2023. EPSS estimates a 5.56% chance of exploitation in the next 30 days, higher than 92.7% of scored vulnerabilities.

Timeline

1. 14-02-2023
   PublishedVulnerability first disclosed.
2. 14-02-2023
   Added to CISA KEVMicrosoft Windows Graphic Component Privilege Escalation Vulnerability
3. 07-03-2023
   CISA remediation dueApply updates per vendor instructions.
4. 19-08-2026
   Last modifiedVulnerability information updated.

Description

Windows Graphics Component Remote Code Execution Vulnerability

• CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.