Vulnerability Description
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.
Related Weaknesses (CWE)
References
- https://github.com/FreeRDP/FreeRDP/commit/caf653c0ba1c75ec8f298d1baa59770102a5d1
- https://github.com/FreeRDP/FreeRDP/pull/12993
- https://github.com/FreeRDP/FreeRDP/releases/tag/3.28.0
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9g22-w2gr-vcmp
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9g22-w2gr-vcmp
FAQ
What is CVE-2026-63652?
CVE-2026-63652 is a documented vulnerability. 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...
How severe is CVE-2026-63652?
CVSS scoring is not yet available for CVE-2026-63652. Check NVD for updates.
Is there a patch for CVE-2026-63652?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.