CVE-2026-20869
Race Condition in Windows LSM Enables Local Privilege Escalation
Publication date: 2026-01-13
Last updated on: 2026-01-13
Assigner: Microsoft Corporation
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| microsoft | windows_local_session_manager | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| 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
How can this vulnerability impact me? :
An attacker who already has some level of authorization on the system can exploit this vulnerability to gain higher privileges than intended. This elevation of privilege can lead to unauthorized actions, potentially compromising system security and integrity. [1]
Can you explain this vulnerability to me?
This vulnerability is a race condition in the Windows Local Session Manager (LSM) where concurrent execution using a shared resource lacks proper synchronization. This flaw allows an authorized attacker to elevate their privileges locally on the affected system. [1]