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CVE-2026-85090— FreeRDP before 3.31.0 Heap Out-of-Bounds Read via AVC444

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是FreeRDP团队开源的一款远程桌面协议(RDP)的实现。 FreeRDP 3.31.0之前版本存在缓冲区错误漏洞，该漏洞源于general_ChromaV1ToYUV444函数在AVC444色度平面重建过程中存在堆越界读取，恶意RDP服务器可构造特制的RFX_AVC444_BITMAP_STREAM，通过特定帧几何触发超出已分配亮度平面的越界内存读取。

CVSS 5.4 · Medium EPSS 0.28% · P19

Affected Version Matrix 2

VendorProduct Version RangeStatus
FreeRDP FreeRDP 3.0.0< 3.31.0 affected
3.31.0 unaffected
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I. Basic Information for CVE-2026-85090

Vulnerability Information
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Vulnerability Title
FreeRDP before 3.31.0 Heap Out-of-Bounds Read via AVC444
Source: CVE Program / CVE List V5
Vulnerability Description
FreeRDP before 3.31.0 contains a heap out-of-bounds read vulnerability in the general_ChromaV1ToYUV444 function during AVC444 chroma plane reconstruction. A malicious RDP server can craft a RFX_AVC444_BITMAP_STREAM with specific frame geometry to trigger an out-of-bounds memory read past the allocated luma plane.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
FreeRDP 缓冲区错误漏洞
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 3.31.0之前版本存在缓冲区错误漏洞，该漏洞源于general_ChromaV1ToYUV444函数在AVC444色度平面重建过程中存在堆越界读取，恶意RDP服务器可构造特制的RFX_AVC444_BITMAP_STREAM，通过特定帧几何触发超出已分配亮度平面的越界内存读取。
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

Vendor Product Affected Versions CPE Subscribe
FreeRDP FreeRDP 3.0.0 ~ 3.31.0 -

II. Public POCs for CVE-2026-85090

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III. Intelligence Information for CVE-2026-85090

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Patches & Fixes for CVE-2026-85090 (1)

Vendor Advisories for CVE-2026-85090 (2)

Vendor Pages for CVE-2026-85090 (2)

IV. Related Vulnerabilities

Same product: FreeRDP
Same vendor: FreeRDP
Same weakness: CWE-125

V. Comments for CVE-2026-85090

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