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.
Published: 2026-11-04
Score: 8.2 High
EPSS: < 1% Very Low
KEV: No
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Thu, 05 Nov 2026 19:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Wed, 04 Nov 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 04 Nov 2026 15:45:00 +0000

Type Values Removed Values Added
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.
Title FreeRDP before 3.32.2 Use-After-Free via Dynamic rdpsnd Channel Close
First Time appeared Freerdp
Freerdp freerdp
Weaknesses CWE-362
CPEs cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*
Vendors & Products Freerdp
Freerdp freerdp
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.2, 'vector': '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-11-04T18:20:37.767Z

Reserved: 2026-11-04T12:48:39.813Z

Link: CVE-2026-121963

cve-icon Vulnrichment

Updated: 2026-11-04T18:20:33.500Z

cve-icon NVD

Status : Analyzed

Published: 2026-11-04T16:17:49.500

Modified: 2026-11-05T19:16:25.800

Link: CVE-2026-121963

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-05T21:00:21Z

Weaknesses
  • CWE-362

    Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

  • CWE-416

    Use After Free