CVE-2026-27951
Infinite Loop Vulnerability in FreeRDP Stream_EnsureCapacity Function
Publication date: 2026-02-25
Last updated on: 2026-02-27
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| freerdp | freerdp | to 3.23.0 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-190 | The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in FreeRDP, a free implementation of the Remote Desktop Protocol. Before version 3.23.0, the function Stream_EnsureCapacity can cause an endless blocking loop. This means that when this function is called, it may get stuck indefinitely, causing the program to hang.
The issue affects all client and server implementations using FreeRDP. However, practical exploitation is limited to 32-bit systems where the available physical memory is greater than or equal to SIZE_MAX.
Version 3.23.0 of FreeRDP contains a patch that fixes this vulnerability, and there are no known workarounds available.
How can this vulnerability impact me? :
The vulnerability can cause an endless blocking loop in FreeRDP, which may lead to a denial of service condition by making the affected client or server hang indefinitely.
This impact is limited to 32-bit systems with very large amounts of physical memory (greater than or equal to SIZE_MAX).
The CVSS v3.1 base score is 5.3, indicating a medium severity primarily due to availability impact without affecting confidentiality or integrity.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, you should upgrade FreeRDP to version 3.23.0 or later, as this version contains the patch that fixes the issue.
No known workarounds are available, so applying the update is the recommended immediate step.