CVE-2026-56297

HIGH SEVERITY

CVSS Score & Metrics

Base Score

7.0 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H                                    

Vulnerability Description

FreeRDP before 3.22.0 contains a use-after-free vulnerability in dvcman_channel_close and dvcman_call_on_receive due to improper synchronization of channel_callback access. A malicious RDP server can trigger a race condition by sending DYNVC_DATA and DYNVC_CLOSE messages concurrently, causing heap-use-after-free in the drdynvc client thread and potentially enabling remote code execution or denial of service.

Vulnerability Details

Published Date

July 08, 2026

Last Modified

July 10, 2026

CWE ID

CWE-362

Source

NVD

Vendor

FreeRDP

Product

FreeRDP

External References

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3mv2-5q57-2v8h
https://www.vulncheck.com/advisories/freerdp-use-after-free-via-race-condition-in-drdynvc-channel-callback
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3mv2-5q57-2v8h

CVE-2026-56297

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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