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CVE-2026-121953 Details

Description

FreeRDP before 3.32.2 has a use-after-free in the client's rdpgfx dynamic virtual channel: a duplicate-name channel with a new ChannelId overwrites the listener's single callback slot, which rdpgfx_on_close frees without clearing. A malicious RDP server can open and close such a channel, then send a PDU on the original channel to crash the client or potentially execute code.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-6wqx-rv3q-vcxp	CISA-ADP	ExploitMitigationVendor Advisory
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-6wqx-rv3q-vcxp	[email protected]	ExploitMitigationVendor Advisory
https://www.vulncheck.com/advisories/freerdp-before-3.32.2-use-after-free-via-rdpgfx-dynamic-virtual-channel-close	[email protected]	Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-416	Use After Free	[email protected]

Affected Products

Product	Versions
freerdp freerdp	< 3.32.2
CPE cpe:2.3:a:freerdp:freerdp:::::::: Remediation No remediation found in references.

Change History

3 change records found show changes

Date	Action	Recorded By
Nov 5, 2026	Initial Analysis	[email protected]
Nov 4, 2026	CVE Modified	CISA-ADP
Nov 4, 2026	New CVE Received	[email protected]