CVE-2025-55687
Unknown
Unknown - Not Provided
BaseFortify
Publication date: 2025-10-14
Last updated on: 2025-10-27
Assigner: Microsoft Corporation
Description
Description
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Resilient File System (ReFS) allows an unauthorized attacker to elevate privileges locally.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| microsoft | windows_10_1507 | to 10.0.10240.21161 (exc) |
| microsoft | windows_10_1607 | to 10.0.14393.8519 (exc) |
| microsoft | windows_10_1809 | to 10.0.17763.7919 (exc) |
| microsoft | windows_10_21h2 | to 10.0.19044.6456 (exc) |
| microsoft | windows_10_22h2 | to 10.0.19045.6456 (exc) |
| microsoft | windows_11_22h2 | to 10.0.22621.6060 (exc) |
| microsoft | windows_11_23h2 | to 10.0.22631.6060 (exc) |
| microsoft | windows_11_24h2 | to 10.0.26100.6899 (exc) |
| microsoft | windows_11_25h2 | to 10.0.26200.6899 (exc) |
| microsoft | windows_server_2012 | * |
| microsoft | windows_server_2012 | r2 |
| microsoft | windows_server_2016 | to 10.0.14393.8519 (exc) |
| microsoft | windows_server_2019 | to 10.0.17763.7919 (exc) |
| microsoft | windows_server_2022 | to 10.0.20348.4294 (exc) |
| microsoft | windows_server_2022_23h2 | to 10.0.25398.1913 (exc) |
| microsoft | windows_server_2025 | to 10.0.26100.6899 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| 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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. |
| CWE-362 | The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a race condition in the Windows Resilient File System (ReFS) caused by concurrent execution using a shared resource without proper synchronization. It allows an unauthorized local attacker to elevate their privileges on the affected system.
How can this vulnerability impact me? :
An attacker exploiting this vulnerability can gain elevated privileges locally, potentially allowing them to execute actions with higher permissions than intended, which could lead to unauthorized access, data modification, or system compromise.
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