CVE-2026-121963

MediumCVSS 5.9/10Last modified Nov 5, 2026

Description

FreeRDP before 3.32.2 contains a use-after-free vulnerability in the asynchronous dynamic rdpsnd channel that allows malicious RDP servers to trigger freed callback access by closing the channel with queued audio PDUs. Attackers can send a training PDU then close the channel so the playback thread reads the freed callback in rdpsnd_virtual_channel_write, crashing the client.

Metrics

CVSS 3.1 5.9/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-362 CWE-416

Affected software

Vendor	Product	Versions
FreeRDP	FreeRDP	< 3.32.2

References

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-cx9c-q4jc-wm6cExploit, Vendor Advisory
https://www.vulncheck.com/advisories/freerdp-before-3.32.2-use-after-free-via-dynamic-rdpsnd-channel-closeThird Party Advisory
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-cx9c-q4jc-wm6cExploit, Vendor Advisory

Timeline

Published: Nov 4, 2026
Last modified: Nov 5, 2026
NVD status: Analyzed

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