CVE-2026-44803

CVE-2026-44803

Integer overflow or wraparound in Windows Win32K - GRFX allows an unauthorized attacker to execute code locally.

Vulnerability class: Integer Overflow

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

secure@microsoft.com

Frequently asked questions

What is CVE-2026-44803?: CVE-2026-44803 is a high-severity vulnerability, classified under Integer Overflow or Wraparound. CVSS score: 7.8/10. Published 2026-06-09.
How severe is CVE-2026-44803?: High severity. CVSS v3 base score is 7.8 out of 10.