CVE-2026-25959
February 25, 2026
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, "xf_cliprdr_provide_data_" passes freed "pDstData" to "XChangeProperty" because the cliprdr channel thread calls "xf_cliprdr_server_format_data_response" which converts and uses the clipboard data without holding any lock, while the X11 event thread concurrently calls "xf_cliprdr_clear_cached_data" → "HashTable_Clear" which frees the same data via "xf_cached_data_free", triggering a heap use after free. Version 3.23.0 fixes the issue.
Affected Packages
https://github.com/FreeRDP/FreeRDP.git (GITHUB):
Affected version(s) >=1.0-beta1 <2.11.8Fix Suggestion:
Update to version 2.11.8https://github.com/FreeRDP/FreeRDP.git (GITHUB):
Affected version(s) >=3.0.0 <3.23.0Fix Suggestion:
Update to version 3.23.0Related Resources (9)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.5
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
Exploit Maturity
POC
CVSS v3
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Weakness Type (CWE)
Use After Free
EPSS
Base Score:
0.07
