Microsoft Windows Win32k Use-After-Free Vulnerability
Use after free in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges locally.
What happened
Use after free in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges locally.
CISA lists it as exploited, added 11 Mar 2025.
Does it affect you
Names Microsoft Windows Server. Enter the product and version you run to place it against the affected range the vendor published.
What to do
- Apply the vendor patch named in this advisory.
msrc.microsoft.com - Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
cisa.gov
CISA’s notes for this entry:
Affected, as published to NVD
- ms-winserver
- Microsoft Windows Server: everything below 10.0.14393.7876
The record
- NVD status
- Analyzed
- Published
- 11 Mar 2025, last modified 17 Jun 2026 (NVD)
- Severity
- CVSS 3.1 base score 7.0, High — computed here from the vector; NVD states 7.0.
- Vector
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness
- CWE-416 Use After Free (NVD; names by MITRE)
- Exploitation
- Listed in CISA’s Known Exploited Vulnerabilities catalogue since 11 Mar 2025; federal remediation due 01 Apr 2025. CISA entry
- Exploit probability
- EPSS 1.4%, 72nd percentile — FIRST, scored 23 Oct 2026. FIRST EPSS
- Vendor
- Microsoft · Windows (CISA)
References on the NVD record
- msrc.microsoft.com/update-guide/vulnerability/CVE-2025-24983PatchVendor Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-24983US Government Resource
Sources
The verdict above is computed from the products and versions you entered and the affected ranges the vendor published to NVD. It does not inspect your environment, and this site never reports a product as unaffected: why.