SARA / Free Tools / CVE / CVE-2025-24983

CVE-2025-24983 — Microsoft Windows Win32k Use-After-Free Vulnerability

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

CVSS

7.0 HIGH

EPSS

67.00% (top 29.00%)

CWE

CWE-416

Published

2025-03-11T16:59:17.608Z

Last modified

2026-02-26T19:09:39.770Z

CVSS 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

CISA KEV — Actively Exploited

Added to KEV

2025-03-11

BOD 22-01 due

2025-04-01

Ransomware use

Unknown

View KEV detail

01What is this vulnerability?

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

Vendor	Product	Versions
Microsoft	Windows 10 Version 1507	10.0.10240.0
Microsoft	Windows 10 Version 1607	10.0.14393.0
Microsoft	Windows Server 2008 R2 Service Pack 1	6.1.7601.0
Microsoft	Windows Server 2008 R2 Service Pack 1 (Server Core installation)	6.1.7601.0
Microsoft	Windows Server 2008 Service Pack 2	6.0.6003.0
Microsoft	Windows Server 2008 Service Pack 2 (Server Core installation)	6.0.6003.0
Microsoft	Windows Server 2012	6.2.9200.0
Microsoft	Windows Server 2012 (Server Core installation)	6.2.9200.0
Microsoft	Windows Server 2012 R2	6.3.9600.0
Microsoft	Windows Server 2012 R2 (Server Core installation)	6.3.9600.0
Microsoft	Windows Server 2016	10.0.14393.0
Microsoft	Windows Server 2016 (Server Core installation)	10.0.14393.0

Yes — actively exploited. Added to the CISA KEV catalog on 2025-03-11. Ransomware use: Unknown.

Patch to a fixed version listed in the vendor advisory (see references below).
Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
Hunt historical logs for exploitation indicators — see Detection signatures below.

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

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

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