CVE-2026-121953

CriticalCVSS 9.8/10Last modified Nov 5, 2026

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 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-416

Affected software

VendorProductVersions
FreeRDPFreeRDP< 3.32.2

References

Timeline

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

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CVE-2026-121953: Critical severity, CVSS 9.8 | Vulnix