# CVE-2026-63652

## Summary

- **CVE ID:** CVE-2026-63652
- **Severity:** HIGH
- **CVSS Score:** 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)
- **CWE:** CWE-415
- **Published:** Aug 19, 2026
- **Last Modified:** Aug 19, 2026

## 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.

## Affected Products

- FreeRDP — FreeRDP (< 3.28.0)

## References

- [CNA](https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9g22-w2gr-vcmp)
- [CNA](https://github.com/FreeRDP/FreeRDP/pull/12993)
- [CNA](https://github.com/FreeRDP/FreeRDP/commit/caf653c0ba1c75ec8f298d1baa59770102a5d14c)
- [CNA](https://github.com/FreeRDP/FreeRDP/releases/tag/3.28.0)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.34%
- **EPSS Percentile:** 27.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._