CVE-2026-57156— FreeRDP: Integer overflow leading to heap buffer overflow in Orders Delta Points parsing
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-57156
Vulnerability Information
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Vulnerability Title
FreeRDP: Integer overflow leading to heap buffer overflow in Orders Delta Points parsing
Source: CVE Program / CVE List V5
Vulnerability Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0 on 32-bit builds, FreeRDP clients contain an integer overflow in update_read_delta_points in libfreerdp/core/orders.c when multiplying an attacker-controlled point count by sizeof(DELTA_POINT), allowing a malicious RDP peer to allocate an undersized heap buffer and then write beyond it during initialization. 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:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
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 3.28.0之前版本存在安全漏洞，该漏洞源于在32位构建中，libfreerdp/core/orders.c文件的update_read_delta_points函数中，将攻击者控制的点计数乘以sizeof(DELTA_POINT)时出现整数溢出，可能导致恶意RDP对等点分配过小的堆缓冲区并在初始化期间越界写入。
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
II. Public POCs for CVE-2026-57156
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Patches & Fixes for CVE-2026-57156 (3)
Vendor Advisories for CVE-2026-57156 (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-2026-57158 | FreeRDP planar_decompress_plane_rle_only: heap OOB read — incomplete fix for CVE-2026-2353 |
IV. Related Vulnerabilities
Same product: FreeRDP
- CVE-2026-68580
FreeRDP before 3.29.0 Integer Overflow via Audio Input Chann - CVE-2026-68579
FreeRDP before 3.30.0 Heap Overflow via CliprdrStream_Read - 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-2026-67302
FreeRDP rdpecam StartStreamsRequest divide-by-zero denial of
Same vendor: FreeRDP
- CVE-2026-68580
FreeRDP before 3.29.0 Integer Overflow via Audio Input Chann - CVE-2026-68579
FreeRDP before 3.30.0 Heap Overflow via CliprdrStream_Read - CVE-2026-67298
FreeRDP 3.28.0 Heap Buffer Overflow via RAIL orderLength Und - CVE-2026-66401
FreeRDP before 3.29.0 Out-of-Bounds Read via UVC H.264 - CVE-2026-67302
FreeRDP rdpecam StartStreamsRequest divide-by-zero denial of
Same weakness: CWE-122
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MZ Automation libiec61850 ASDU Element sv_subscriber.c SVRec - CVE-2026-18938
P11-kit: integer overflow in rpc attribute-array length calc - CVE-2026-19156
Google Chrome 缓冲区错误漏洞 - CVE-2026-19138
Chrome <151.0.7922.109堆缓冲区溢出漏洞
V. Comments for CVE-2026-57156
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