Copyright © 2012 Red Hat, Inc. All rights reserved. Moderate 2026-08-01T12:22:17 FreeRDP: FreeRDP: Denial of Service due to RDPEI message processing 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CWE-20

FreeRDP before 3.29.0 contains a denial of service vulnerability in the RDPEI server channel handler that fails to validate maximum PDU body length before stream allocation. A malicious RDP client can send a header-only RDPEI message with a large declared body length to force excessive memory allocation on the server.

A flaw was found in FreeRDP. A remote attacker can exploit a vulnerability in the Remote Desktop Protocol (RDP) Enhanced Input (RDPEI) server channel handler. By sending a malicious RDPEI message with an oversized declared body length, the attacker can force the server to allocate excessive memory, leading to a denial of service (DoS).

A Moderate denial of service (DoS) vulnerability in FreeRDP's RDPEI server channel affects systems acting as an RDP server or proxy. A remote, unauthenticated attacker can send a specially crafted RDP message to trigger excessive memory allocation, causing service disruption. To mitigate this do not expose FreeRDP server/proxy/shadow (freerdp-shadow-cli / freerdp-proxy) to untrusted networks—allow only trusted clients via firewall, or disable those services if unused. Red Hat Enterprise Linux 10 Affected freerdp Red Hat Enterprise Linux 6 Not affected freerdp Red Hat Enterprise Linux 7 Affected freerdp Red Hat Enterprise Linux 8 Affected freerdp Red Hat Enterprise Linux 9 Affected freerdp https://www.cve.org/CVERecord?id=CVE-2026-67296 https://nvd.nist.gov/vuln/detail/CVE-2026-67296 https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-jm8r-22j6-4m4v https://www.vulncheck.com/advisories/freerdp-before-denial-of-service-via-rdpei-pdu