CVE-2026-68579— FreeRDP before 3.30.0 Heap Overflow via CliprdrStream_Read
Possible ATT&CK Techniques 2AI
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I. Basic Information for CVE-2026-68579
Vulnerability Information
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Vulnerability Title
FreeRDP before 3.30.0 Heap Overflow via CliprdrStream_Read
Source: CVE Program / CVE List V5
Vulnerability Description
FreeRDP before 3.30.0 (<= 3.29.0) contains a heap-based buffer overflow in the Windows clipboard client's CliprdrStream_Read function (client/Windows/wf_cliprdr.c). When an OLE paste consumer (e.g. explorer.exe) calls IStream::Read with a fixed-size buffer of cb bytes, CliprdrStream_Read requests file contents from the RDP server and then copies the response into the caller's buffer using the server-supplied length (req_fsize) instead of cb. A malicious or compromised RDP server can return an oversized CB_FILECONTENTS_RESPONSE, causing an out-of-bounds write of attacker-controlled data into the paste consumer's heap buffer when a user pastes server-offered clipboard file contents.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-68579
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
Qwen3.6-35B-A3B · 11064 chars
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III. Intelligence Information for CVE-2026-68579
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Patches & Fixes for CVE-2026-68579 (1)
Vendor Advisories for CVE-2026-68579 (2)
IV. Related Vulnerabilities
Same product: FreeRDP
- CVE-2026-68580
FreeRDP before 3.29.0 Integer Overflow via Audio Input Chann - CVE-2026-66401
FreeRDP before 3.29.0 Out-of-Bounds Read via UVC H.264 - CVE-2026-67298
FreeRDP 3.28.0 Heap Buffer Overflow via RAIL orderLength Und - CVE-2026-67288
FreeRDP before 3.29.0 Denial of Service via smartcard cache - CVE-2026-67295
FreeRDP before 3.29.0 Path Traversal via drive redirection
Same vendor: FreeRDP
- CVE-2026-68580
FreeRDP before 3.29.0 Integer Overflow via Audio Input Chann - CVE-2026-67298
FreeRDP 3.28.0 Heap Buffer Overflow via RAIL orderLength Und - CVE-2026-67288
FreeRDP before 3.29.0 Denial of Service via smartcard cache - CVE-2026-66401
FreeRDP before 3.29.0 Out-of-Bounds Read via UVC H.264 - CVE-2026-67295
FreeRDP before 3.29.0 Path Traversal via drive redirection
V. Comments for CVE-2026-68579
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