Uncontrolled Memory Allocation in FreeRDP - #VU137832
Published: July 16, 2026
Vulnerability identifier: #VU137832
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-789
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: FreeRDP
Affected software:
FreeRDP
FreeRDP
Detailed vulnerability description
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to uncontrolled memory allocation in rdpei_server_handle_messages() when processing a peer-controlled RDPEI PDU length field. A remote user can send a specially crafted RDPEI header with a large declared body length to cause a denial of service.
The issue affects FreeRDP server, proxy, or shadow deployments where the RDPEI channel is reachable.
Remediation
Install security update from vendor's website.