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CVE-2026-114042— FreeRDP 3.32.0 Use-After-Free via drdynvc Virtual Channel PDU

Quick assessment

Affected
FreeRDP FreeRDP
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FreeRDP 3.32.0 的 drdynvc 通道中存在一个释放后使用（use-after-free）漏洞：当 totalLength 小于块大小时，该漏洞会使用“拥有流”的释放器去释放由池管理的流。恶意的 RDP 服务器可以发送单个格式正确的虚拟通道 PDU，在客户端执行拆除（teardown）流程时触发该释放操作，导致客户端崩溃。

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-114042

Vulnerability Information
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Vulnerability Title
FreeRDP 3.32.0 Use-After-Free via drdynvc Virtual Channel PDU
Source: CVE Program / CVE List V5
Vulnerability Description
FreeRDP 3.32.0 contains a use-after-free vulnerability in the drdynvc channel that frees a pool-owned stream with the owned-stream deallocator when totalLength is smaller than the chunk size. A malicious RDP server can send a single well-formed Virtual Channel PDU to trigger the free and crash the client during teardown.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
FreeRDP FreeRDP 3.32.0 ~ 3.32.1 -

II. Public POCs for CVE-2026-114042

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III. Intelligence Information for CVE-2026-114042

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Other References for CVE-2026-114042 (2)

Same Patch Batch · FreeRDP · 2026-10-21 · 7 CVEs total

CVE-2026-114045 8.8 HIGH FreeRDP before 3.32.1 Heap Buffer Overflow via rdpsnd_server_select_format
CVE-2026-114047 6.8 MEDIUM FreeRDP 2.0.0 before 3.32.0 Proxy Improper TLS Certificate Validation
CVE-2026-114046 6.5 MEDIUM FreeRDP 3.0.0 before 3.32.0 null-pointer dereference via emulated smartcard
CVE-2026-114043 6.5 MEDIUM Vulnerability in FreeRDP
CVE-2026-114041 6.5 MEDIUM FreeRDP before 3.32.1 Heap Out-of-Bounds Read via RD Gateway Consent Message
CVE-2026-114044 5.3 MEDIUM FreeRDP before 3.32.1 Android Client Heap OOB Read via Graphics Pipeline

IV. Related Vulnerabilities

Same product: FreeRDP
Same vendor: FreeRDP
Same weakness: CWE-416

V. Comments for CVE-2026-114042

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