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CVE-2026-67296— FreeRDP before 3.29.0 Denial of Service via RDPEI PDU

CVSS 7.5 · High EPSS 0.34% · P27

Affected Version Matrix 2

VendorProductVersion RangeStatus
FreeRDPFreeRDP< 3.29.0affected
3.29.0unaffected
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I. Basic Information for CVE-2026-67296

Vulnerability Information
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Vulnerability Title
FreeRDP before 3.29.0 Denial of Service via RDPEI PDU
Source: CVE Program / CVE List V5
Vulnerability Description
FreeRDP before 3.29.0 contains a denial of service vulnerability in the RDPEI server channel handler that fails to validate maximum PDU body length before stream allocation. A malicious RDP client can send a header-only RDPEI message with a large declared body length to force excessive memory allocation on the server.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
FreeRDP 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FreeRDP是FreeRDP团队开源的一款远程桌面协议(RDP)的实现。 FreeRDP 3.29.0之前版本存在输入验证错误漏洞，该漏洞源于RDPEI服务器通道处理程序在流分配前未能验证最大PDU主体长度，可能导致恶意RDP客户端发送仅含头部且声明较大主体长度的RDPEI消息，强制服务器过度内存分配，造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
FreeRDPFreeRDP 0 ~ 3.29.0 -

II. Public POCs for CVE-2026-67296

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 8716 chars
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III. Intelligence Information for CVE-2026-67296

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Vendor Advisories for CVE-2026-67296 (2)

Same Patch Batch · FreeRDP · 2026-08-01 · 21 CVEs total

CVE-2026-664029.8 CRITICALFreeRDP before 3.29.0 TLS Certificate Identity Validation Bypass
CVE-2026-672899.8 CRITICALFreeRDP before 3.29.0 HTTP Proxy Request Injection via Redirection
CVE-2026-673059.4 CRITICALFreeRDP Windows Client before 3.29.0 Heap Buffer Overflow via Cliprdr
CVE-2026-672997.5 HIGHFreeRDP before 3.29.0 Use-After-Free via WindowIcon async message
CVE-2026-673047.5 HIGHFreeRDP before 3.29.0 NULL Dereference via smartcard cleanup
CVE-2026-672977.5 HIGHFreeRDP before 3.29.0 Resource Exhaustion via chunked HTTP response
CVE-2026-673017.5 HIGHFreeRDP before 3.29.0 Out-of-bounds Read via Polygon async message-proxy
CVE-2026-672907.5 HIGHFreeRDP before 3.29.0 Heap Out-of-Bounds Read via TSMF
CVE-2026-672917.5 HIGHFreeRDP before 3.29.0 Heap Out-of-Bounds Read via GLYPH_FRAGMENT_ADD
CVE-2026-673007.5 HIGHFreeRDP before 3.29.0 Use-After-Free via async message proxy
CVE-2026-672887.5 HIGHFreeRDP before 3.29.0 Denial of Service via smartcard cache
CVE-2026-672987.5 HIGHFreeRDP 3.28.0 Heap Buffer Overflow via RAIL orderLength Underflow
CVE-2026-672926.5 MEDIUMFreeRDP before 3.29.0 WebSocket Ping Buffer Over-disclosure
CVE-2026-672956.3 MEDIUMFreeRDP before 3.29.0 Path Traversal via drive redirection
CVE-2026-672945.9 MEDIUMFreeRDP before 3.29.0 TLS Certificate EKU Bypass
CVE-2026-673065.4 MEDIUMFreeRDP before 3.29.0 Out-of-Bounds Read via Planar RLE
CVE-2026-673034.3 MEDIUMFreeRDP before 3.29.0 Denial of Service via serial DeviceControl
CVE-2026-673024.3 MEDIUMFreeRDP rdpecam StartStreamsRequest divide-by-zero denial of service
CVE-2026-672934.2 MEDIUMFreeRDP before 3.29.0 Improper Certificate Hostname Validation
CVE-2026-664012.1 LOWFreeRDP before 3.29.0 Out-of-Bounds Read via UVC H.264

IV. Related Vulnerabilities

Same product: FreeRDP
Same vendor: FreeRDP
Same weakness: CWE-20

V. Comments for CVE-2026-67296

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