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CVE-2026-121953FreeRDP before 3.32.2 Use-After-Free via rdpgfx Dynamic Virtual Channel Close
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.
9.3 CRITICALEPSS 0.56%Not in KEVNVD: Analyzed
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 9.3 | CRITICAL | 4.0VulnCheck (CNA) | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| 9.8 | CRITICAL | 3.1VulnCheck (CNA) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Details
- CVE ID
- CVE-2026-121953
- Status
- Analyzed
- Assigner (CNA)
- VulnCheck
- Published
- Nov 4, 2026
- Last modified
- 2026-11-05 19:32 UTC
- Weaknesses
- CWE-416 · Use After Free
Affected Products
As published by the CNA in the CVE record.
FreeRDPFreeRDP1 version range
- before 3.32.2