CVE-2026-27951 Details
Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, the function `Stream_EnsureCapacity` can create an endless blocking loop. This may affect all client and server implementations using `FreeRDP`. For practical exploitation this will only work on 32bit systems where the available physical memory is `>= SIZE_MAX`. Version 3.23.0 contains a patch. No known workarounds are available.
A vulnerability exists in FreeRDP versions prior to 3.23.0, where the Stream_EnsureCapacity function can cause an infinite blocking loop. This issue affects all client and server implementations using FreeRDP, but can only be exploited on 32-bit systems with sufficient physical memory. The vulnerability arises from improper handling of memory allocation, allowing the function to overflow and create a loop that never terminates.
Users can upgrade to FreeRDP version 3.23.0 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Feb 25, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/FreeRDP/FreeRDP/commit/118afc0b954ba9d5632b7836ad24e454555ed113 | [email protected] | Patch |
| https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-qcfc-ghxr-h927 | [email protected] | ExploitPatchVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-190 | Integer Overflow or Wraparound | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| freerdp freerdp | < 3.23.0 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Feb 27, 2026 | Initial Analysis | [email protected] |
| Feb 25, 2026 | New CVE Received | [email protected] |