Uncontrolled Memory Allocation in FreeRDP - CVE-2026-67296
Published: July 16, 2026 / Updated: September 14, 2026
Vulnerability identifier: #VU137832
CSH Severity: Low
CVSS v4: 7.1 [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]
CVE-ID: CVE-2026-67296
CWE-ID: CWE-789
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
FreeRDP
How to mitigate CVE-2026-67296
Install security update from vendor's website.
FreeRDP - update to 3.29.0