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CVE-2026-114045— FreeRDP before 3.32.1 Heap Buffer Overflow via rdpsnd_server_select_format

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 在 3.32.1 版本之前存在一个基于堆的缓冲区溢出漏洞，该漏洞位于服务器端的 rdpsnd 通道中。由于 函数在处理 DVI_ADPCM 块对齐算术运算时发生整数回绕，导致绕过了相关验证机制。恶意 RDP 客户端可发送两个 SNDC_FORMATS PDU，其中 值过小（不足以匹配 的通道数），从而在服务器端进行音频播放时触发无界的堆写入操作，可能导致远程代码执行。

CVSS 8.8 · High
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I. Basic Information for CVE-2026-114045

Vulnerability Information
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Vulnerability Title
FreeRDP before 3.32.1 Heap Buffer Overflow via rdpsnd_server_select_format
Source: CVE Program / CVE List V5
Vulnerability Description
FreeRDP before 3.32.1 contains a heap-based buffer overflow in the server-side rdpsnd channel because an integer wraparound in rdpsnd_server_select_format() DVI_ADPCM block-alignment arithmetic bypasses validation. A malicious RDP client can send two SNDC_FORMATS PDUs with an nBlockAlign too small for nChannels, causing an unbounded heap write during server audio playback, potentially enabling code execution.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
FreeRDP FreeRDP 0 ~ 3.32.1 -

II. Public POCs for CVE-2026-114045

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III. Intelligence Information for CVE-2026-114045

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Other References for CVE-2026-114045 (2)

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

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-2026-114042 6.5 MEDIUM FreeRDP 3.32.0 Use-After-Free via drdynvc Virtual Channel PDU
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-122

V. Comments for CVE-2026-114045

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