CVE-2025-54919: Microsoft Windows 10 1809

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Win32K - GRFX allows an authorized attacker to execute code locally.

Affected products

• Microsoft Windows 10 1809: before 10.0.17763.7792 (fixed in 10.0.17763.7792)
• Microsoft Windows 10 21h2: before 10.0.19044.6332 (fixed in 10.0.19044.6332)
• Microsoft Windows 10 22h2: before 10.0.19045.6332 (fixed in 10.0.19045.6332)
• Microsoft Windows 11 22h2: before 10.0.22621.5909 (fixed in 10.0.22621.5909)
• Microsoft Windows 11 23h2: before 10.0.22631.5909 (fixed in 10.0.22631.5909)
• Microsoft Windows 11 24h2: before 10.0.26100.6508 (fixed in 10.0.26100.6508)
• Microsoft Windows Server 2019: before 10.0.17763.7792 (fixed in 10.0.17763.7792)
• Microsoft Windows Server 2022: before 10.0.20348.4106 (fixed in 10.0.20348.4106)
• Microsoft Windows Server 2022 23h2: before 10.0.25398.1849 (fixed in 10.0.25398.1849)
• Microsoft Windows Server 2025: before 10.0.26100.6508 (fixed in 10.0.26100.6508)

Published 2025-09-09. Last modified 2026-06-17.