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CVE-2026-57158— FreeRDP planar_decompress_plane_rle_only: heap OOB read — incomplete fix for CVE-2026-23530

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团队开源的一款开源的远程桌面协议(RDP)的实现。 FreeRDP 3.21.0版本至3.28.0之前版本存在缓冲区错误漏洞，该漏洞源于planar_decompress_plane_rle_only函数中存在越界读取问题，可能导致恶意RDP服务器发送截断的RDPGFX_CMDID_WIRETOSURFACE_1 planar有效载荷，读取输入缓冲区之外的一个字节。

AI Predicted 5.9 Difficulty: Moderate EPSS 0.69% · P51

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
FreeRDP FreeRDP >= 3.21.0, < 3.28.0 affected
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I. Basic Information for CVE-2026-57158

Vulnerability Information
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Vulnerability Title
FreeRDP planar_decompress_plane_rle_only: heap OOB read — incomplete fix for CVE-2026-23530
Source: CVE Program / CVE List V5
Vulnerability Description
FreeRDP is a free implementation of the Remote Desktop Protocol. From 3.21.0 before 3.28.0, FreeRDP clients using the GFX pipeline contain an incomplete fix for CVE-2026-23530 in planar_decompress_plane_rle_only in libfreerdp/codec/planar.c, allowing a malicious RDP server to send a truncated RDPGFX_CMDID_WIRETOSURFACE_1 planar payload that reads one byte past the input buffer. This issue is fixed in version 3.28.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
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团队开源的一款开源的远程桌面协议(RDP)的实现。 FreeRDP 3.21.0版本至3.28.0之前版本存在缓冲区错误漏洞，该漏洞源于planar_decompress_plane_rle_only函数中存在越界读取问题，可能导致恶意RDP服务器发送截断的RDPGFX_CMDID_WIRETOSURFACE_1 planar有效载荷，读取输入缓冲区之外的一个字节。
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 >= 3.21.0, < 3.28.0 -

II. Public POCs for CVE-2026-57158

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III. Intelligence Information for CVE-2026-57158

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Patches & Fixes for CVE-2026-57158 (3)

Vendor Advisories for CVE-2026-57158 (1)

Same Patch Batch · FreeRDP · 2026-07-10 · 4 CVEs total

CVE-2026-55827 7.5 HIGH FreeRDP: Heap out-of-bounds write in RemoteFX (RFX) Cache Bitmap V3 decode
CVE-2026-57157 6.5 MEDIUM Out-of-bounds read in the camera device enumerator server (rdpecam) via unterminated Devic
CVE-2026-57156 FreeRDP: Integer overflow leading to heap buffer overflow in Orders Delta Points parsing

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-57158

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