CVE-2026-63652

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0, rdpsnd_server_recv_formats in channels/rdpsnd/server/rdpsnd_main.c frees context->client_formats on a malformed Client Audio Formats PDU without clearing the owning pointer or num_client_formats. An authenticated RDP client can trigger an error such as a cbSize larger than the remaining record, leave the dangling pointer in the server context, and cause rdpsnd_server_context_free to free the same allocation again at session teardown. This reliably terminates the server and can create allocator-dependent heap corruption. This issue is fixed in version 3.28.0.

• CWE-415

• https://github.com/FreeRDP/FreeRDP/commit/caf653c0ba1c75ec8f298d1baa59770102a5d14cPatch
• https://github.com/FreeRDP/FreeRDP/pull/12993Issue Tracking, Patch
• https://github.com/FreeRDP/FreeRDP/releases/tag/3.28.0Release Notes
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9g22-w2gr-vcmpExploit, Mitigation, Vendor Advisory
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9g22-w2gr-vcmpExploit, Mitigation, Vendor Advisory

Published

Aug 19, 2026

Last Modified

Sep 22, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-63645OpenObserve is a cloud-native observability platform. Prior …7.5
• CVE-2026-63646CordysCRM is an open source AI-powered customer relationship…6.9
• CVE-2026-63647CordysCRM is an open source AI-powered customer relationship…9.3
• CVE-2026-63649The Windows interactive service in OpenVPN 2.4.0 through 2.6…4.1
• CVE-2026-6365Improper Neutralization of Input During Web Page Generation …6.1
• CVE-2026-63650OpenVPN 2.7_alpha1 through 2.7.5 using mbedTLS allows remote…2
• CVE-2026-63654Frappe is a full-stack web application framework. In version…6.9
• CVE-2026-6366Improperly Controlled Modification of Dynamically-Determined…6.6
• CVE-2026-63667ApostropheCMS is an open-source Node.js content management s…6.5
• CVE-2026-63669ApostropheCMS is an open-source Node.js content management s…6.5
• CVE-2026-6367Improper Neutralization of Input During Web Page Generation …6.1
• CVE-2026-63670ApostropheCMS is an open-source Node.js content management s…6.1