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CVE-2026-121963FreeRDP before 3.32.2 Use-After-Free via Dynamic rdpsnd Channel Close

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.

8.2 HIGHEPSS 0.31%Not in KEVNVD: Analyzed

OverviewAffected ProductsReferences
NVD CVE.org

Overview

Severity

ScoreSeverityVersionVector String
8.2HIGH4.0VulnCheck (CNA)CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.9MEDIUM3.1VulnCheck (CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CVE ID
CVE-2026-121963
Status
Analyzed
Assigner (CNA)
VulnCheck
Published
Nov 4, 2026
Last modified
2026-11-05 19:16 UTC
Weaknesses
  • CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
  • CWE-416

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 10:43 UTC.