Stack-based Buffer Overflow in Microsoft Graphics Component by Microsoft
CVE-2026-83990

7.8HIGH

Key Information:

Vendor

Microsoft
Status
Windows 11 Version 23h2
Windows 11 Version 23h2
Windows 11 Version 24h2
Windows 11 Version 25h2
Vendor
CVE Published:
8 September 2026

What is CVE-2026-83990?

A stack-based buffer overflow vulnerability exists in the Microsoft Graphics Component, which can be exploited by an authorized attacker to elevate their privileges locally. This flaw can lead to potential unauthorized access to system resources and sensitive information if exploited. It is advisable for users to apply the latest security updates from Microsoft to mitigate any risks associated with this vulnerability.

Affected Version(s)

Windows 11 version 23H2 ARM64-based Systems 10.0.22631.0 < 10.0.22631.7582

Windows 11 Version 23H2 x64-based Systems 10.0.22631.0 < 10.0.22631.7582

Windows 11 Version 24H2 ARM64-based Systems 10.0.26100.0 < 10.0.26100.9445

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.