CVE-2026-111881— FreeRDP 3.14.1 before 3.32.0 Integer Underflow in BMP Writer via Clipboard
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 3.14.1 至 3.32.0 版本（不含 3.32.0）在 WinPR BMP 写入器中存在整数下溢漏洞。该漏洞源于步长（stride）计算不匹配，导致在处理亚字节（sub-byte）图像时，将 错误地传递给 函数。恶意的 RDP 剪贴板对等端可返回一个经过精心构造的 1 bpp BMP 图像，该图像会被 函数处理（针对 或 格式），从而引发客户端崩溃或造成越界写入。
Possible ATT&CK Techniques 2 AI
T1068 · Exploitation for Privilege Escalation T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-111881
Vulnerability Information
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Vulnerability Title
FreeRDP 3.14.1 before 3.32.0 Integer Underflow in BMP Writer via Clipboard
Source: CVE Program / CVE List V5
Vulnerability Description
FreeRDP from 3.14.1 before 3.32.0 contains an integer underflow in the WinPR BMP writer, where a mismatched stride calculation passes SIZE_MAX - 3 to Stream_Zero for sub-byte images. A malicious RDP clipboard peer can return a crafted 1-bpp BMP processed by clipboard_synthesize_image_format_to_bmp for CF_DIB/CF_DIBV5, crashing the client or causing an out-of-bounds write.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数下溢(超界折返)
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-111881
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-111881 (2)
IV. Related Vulnerabilities
Same product: FreeRDP
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CVE-2026-111880
FreeRDP 2.0.0 before 3.32.0 Heap Out-of-Bounds Write via NTL -
CVE-2026-111382
FreeRDP before 3.32.0 Heap Out-of-Bounds Write in AVC444 YUV -
CVE-2026-111381
FreeRDP before 3.32.0 Heap Buffer Overflow via Persistent Ca -
CVE-2026-111380
FreeRDP 3.29.0 before 3.32.0 Heap Overflow via audin Apple B -
CVE-2026-111379
FreeRDP before 3.32.0 Heap Buffer Overflow via persistent_ca
Same vendor: FreeRDP
-
CVE-2026-111880
FreeRDP 2.0.0 before 3.32.0 Heap Out-of-Bounds Write via NTL -
CVE-2026-111382
FreeRDP before 3.32.0 Heap Out-of-Bounds Write in AVC444 YUV -
CVE-2026-111381
FreeRDP before 3.32.0 Heap Buffer Overflow via Persistent Ca -
CVE-2026-111380
FreeRDP 3.29.0 before 3.32.0 Heap Overflow via audin Apple B -
CVE-2026-111379
FreeRDP before 3.32.0 Heap Buffer Overflow via persistent_ca
Same weakness: CWE-191
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Dpdk: dpdk: guest with runt rx descriptors underflows copy l -
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Integer underflow of the radio-reported frame length causes
V. Comments for CVE-2026-111881
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