CVE-2026-32070
Use-After-Free in Windows CLFS Driver Enables Local Privilege Escalation
Publication date: 2026-04-14
Last updated on: 2026-04-22
Assigner: Microsoft Corporation
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| microsoft | windows_server_2012 | r2 |
| microsoft | windows_server_2012 | * |
| microsoft | windows_10_1607 | to 10.0.14393.9060 (exc) |
| microsoft | windows_10_1607 | to 10.0.14393.9060 (exc) |
| microsoft | windows_10_1809 | to 10.0.17763.8644 (exc) |
| microsoft | windows_10_1809 | to 10.0.17763.8644 (exc) |
| microsoft | windows_10_21h2 | to 10.0.19044.7184 (exc) |
| microsoft | windows_10_21h2 | to 10.0.19044.7184 (exc) |
| microsoft | windows_10_21h2 | to 10.0.19044.7184 (exc) |
| microsoft | windows_10_22h2 | to 10.0.19045.7184 (exc) |
| microsoft | windows_10_22h2 | to 10.0.19045.7184 (exc) |
| microsoft | windows_10_22h2 | to 10.0.19045.7184 (exc) |
| microsoft | windows_11_23h2 | to 10.0.22631.6936 (exc) |
| microsoft | windows_11_23h2 | to 10.0.22631.6936 (exc) |
| microsoft | windows_11_24h2 | to 10.0.26100.8246 (exc) |
| microsoft | windows_11_24h2 | to 10.0.26100.8246 (exc) |
| microsoft | windows_11_25h2 | to 10.0.26200.8246 (exc) |
| microsoft | windows_11_25h2 | to 10.0.26200.8246 (exc) |
| microsoft | windows_11_26h1 | to 10.0.28000.1836 (exc) |
| microsoft | windows_11_26h1 | to 10.0.28000.1836 (exc) |
| microsoft | windows_server_2016 | to 10.0.14393.9060 (exc) |
| microsoft | windows_server_2019 | to 10.0.17763.8644 (exc) |
| microsoft | windows_server_2022 | to 10.0.20348.5020 (exc) |
| microsoft | windows_server_2022_23h2 | to 10.0.25398.2274 (exc) |
| microsoft | windows_server_2025 | to 10.0.26100.32690 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-416 | The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. |
Attack-Flow Graph
AI Powered Q&A
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
This vulnerability allows an authorized attacker to elevate privileges locally by exploiting a use after free in the Windows Common Log File System Driver.
Elevation of privilege vulnerabilities can potentially lead to unauthorized access or modification of sensitive data, which may impact compliance with standards and regulations such as GDPR and HIPAA that require protection of personal and health information.
However, the provided information does not specify direct effects or compliance implications related to these standards.
Can you explain this vulnerability to me?
This vulnerability is a use-after-free issue in the Windows Common Log File System Driver. It allows an authorized attacker to elevate their privileges locally on the affected system.
How can this vulnerability impact me? :
An attacker who already has some level of access to the system can exploit this vulnerability to gain higher privileges. This means they could perform actions that require elevated permissions, potentially compromising system integrity, confidentiality, and availability.
What immediate steps should I take to mitigate this vulnerability?
This vulnerability allows an authorized attacker to elevate privileges locally via a use after free in the Windows Common Log File System Driver.
To mitigate this vulnerability, it is recommended to apply the security updates provided by Microsoft as soon as possible.