CVE-2026-109248— FreeRDP 3.0.0 before 3.32.0 Heap Out-of-Bounds Read via WinPR Clipboard cFileName
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 版本在 3.0.0 至 3.32.0 之间（不含 3.32.0）存在一个堆越界读取漏洞，位于 WinPR 剪贴板函数 中。该函数在扫描由服务器控制的 结构体的 字段时，使用了无界的 和 调用，且未保证字符串以空字符（NUL）结尾。恶意 RDP 服务器可在 消息中发送奇数长度的 数据块，当用户粘贴服务器复制的文件时，将导致 X11、Wayland 和 SDL 客户端崩溃。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-109248
Vulnerability Information
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Vulnerability Title
FreeRDP 3.0.0 before 3.32.0 Heap Out-of-Bounds Read via WinPR Clipboard cFileName
Source: CVE Program / CVE List V5
Vulnerability Description
FreeRDP 3.0.0 before 3.32.0 contains a heap out-of-bounds read in the WinPR clipboard function convert_filedescriptors_to_file_list(), which scans a server-controlled FILEDESCRIPTORW cFileName with unbounded _wcschr() and count_special_chars() calls without a NUL-termination guarantee. A malicious RDP server can send an odd-length FILEDESCRIPTORW blob in a CB_FORMAT_DATA_RESPONSE, crashing X11, Wayland, and SDL clients when the user pastes server-copied files.
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
跨界内存读
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-109248
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-109248 (2)
Same Patch Batch · FreeRDP · 2026-10-12 · 18 CVEs total
| CVE-2026-109242 | 7.1 HIGH | FreeRDP before 3.0.0 and 3.6.0 before 3.32.0 Uninitialized Heap Disclosure via Progressive |
| CVE-2026-109255 | 6.8 MEDIUM | FreeRDP 3.0.0 before 3.32.0 heap buffer overflow via license_check_stream_length |
| CVE-2026-109245 | 6.8 MEDIUM | FreeRDP 3.0.0 before 3.32.0 Improper Certificate Validation in freerdp_http_request |
| CVE-2026-109250 | 6.6 MEDIUM | FreeRDP 3.0.0 before 3.32.0 Heap Buffer Overflow via PKCS#11 collect_keys() |
| CVE-2026-109244 | 6.6 MEDIUM | FreeRDP 2.0.0 before 3.32.0 Insecure Private Key Permissions in winpr-makecert |
| CVE-2026-109246 | 6.5 MEDIUM | FreeRDP before 3.32.0 Shadow Server Divide-by-Zero via Frame Acknowledge PDU |
| CVE-2026-109254 | 5.9 MEDIUM | FreeRDP 2.1.0 before 3.32.0 Use-After-Free via rdpsnd Disconnect Path |
| CVE-2026-109257 | 5.9 MEDIUM | FreeRDP before 3.32.0 Double Free via NSCodec plane growth failure |
| CVE-2026-109249 | 5.5 MEDIUM | FreeRDP 3.0.0 before 3.32.0 Heap Out-of-Bounds Read via Remote Assistance File Parsing |
| CVE-2026-109252 | 5.3 MEDIUM | FreeRDP from 3.9.0 before 3.32.0 RDPEAR NULL Pointer Dereference via KERB_RPC_INTERNAL_NAM |
| CVE-2026-109251 | 5.3 MEDIUM | FreeRDP before 3.32.0 Out-of-Bounds Write via MS-RDPEGT Video Geometry |
| CVE-2026-109253 | 5.3 MEDIUM | FreeRDP 3.9.0 before 3.32.0 RDPEAR NDR Scalar Out-of-Bounds Read |
| CVE-2026-109256 | 5.3 MEDIUM | FreeRDP 3.10.0 through 3.32.2 Heap Buffer Overflow in WinPR PNG Conversion |
| CVE-2026-109243 | 4.4 MEDIUM | FreeRDP 3.0.0 before 3.32.0 Insecure Permissions on Soft-Smartcard Private Key File |
| CVE-2026-109240 | 3.1 LOW | FreeRDP 3.11.0 before 3.32.1 Reachable Assertion DoS via urb_isoch_transfer |
| CVE-2026-109241 | 3.1 LOW | FreeRDP before 3.32.0 NULL Dereference in Video Redirection Channel |
| CVE-2026-109247 | 3.1 LOW | FreeRDP before 3.32.0 Path Traversal via Clipboard cFileName |
IV. Related Vulnerabilities
Same product: FreeRDP
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CVE-2026-110839
FreeRDP 3.3.0 before 3.32.0 Heap Out-of-Bounds Write via Gra -
CVE-2026-110838
FreeRDP shadow before 3.32.0 Pre-Authentication Input Inject -
CVE-2026-110837
FreeRDP 2.0.0 before 3.32.0 Heap Buffer Overflow via MP3 Aud -
CVE-2026-110836
FreeRDP 3.0.0 before 3.32.0 Infinite Loop DoS via Gateway Co -
CVE-2026-110835
FreeRDP 3.0.0 before 3.32.0 HTTP Header Injection via Proxy
Same vendor: FreeRDP
-
CVE-2026-110839
FreeRDP 3.3.0 before 3.32.0 Heap Out-of-Bounds Write via Gra -
CVE-2026-110838
FreeRDP shadow before 3.32.0 Pre-Authentication Input Inject -
CVE-2026-110837
FreeRDP 2.0.0 before 3.32.0 Heap Buffer Overflow via MP3 Aud -
CVE-2026-110836
FreeRDP 3.0.0 before 3.32.0 Infinite Loop DoS via Gateway Co -
CVE-2026-110835
FreeRDP 3.0.0 before 3.32.0 HTTP Header Injection via Proxy
Same weakness: CWE-125
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CVE-2026-110810
ggml-org whisper.cpp Model Loader whisper_model_load out-of- -
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OpenSIPS rtpproxy rtpproxy_answer out-of-bounds -
CVE-2026-73260
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CVE-2026-106464
CVE-2026-106464
V. Comments for CVE-2026-109248
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