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CVE-2026-41521— xrdp: lib_framebuffer_update Has Integer Overflow Heap Info Leak & ASLR Bypass

Quick assessment

Affected
neutrinolabs xrdp
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

neutrinolabs xrdp是neutrinolabs团队开源的一款开源远程桌面协议服务器。 neutrinolabs xrdp 0.10.6及之前版本存在数字错误漏洞，该漏洞源于在处理vnc-any连接模式中的屏幕更新消息时存在整数溢出，可能导致未经身份验证的远程攻击者利用特制图像尺寸导致内存缓冲区大小计算错误，造成越界读取，从而泄露堆内存敏感信息或通过进程崩溃导致拒绝服务。

CVSS 8.2 · High EPSS 0.67% · P50

Possible ATT&CK Techniques 1 AI

T1027 · Obfuscated Files or Information

Affected Version Matrix 1

VendorProduct Version RangeStatus
neutrinolabs xrdp < 0.10.6.1 affected
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I. Basic Information for CVE-2026-41521

Vulnerability Information
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Vulnerability Title
xrdp: lib_framebuffer_update Has Integer Overflow Heap Info Leak & ASLR Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
xrdp is an open source RDP server. Versions 0.10.6 and prior contain an integer overflow vulnerability when processing screen update messages within the vnc-any connection mode. A malicious remote VNC server can send crafted image dimensions that cause an integer overflow during memory buffer size calculation, resulting in an undersized allocation. Subsequent processing of the incoming image data using the original oversized parameters leads to an out-of-bounds read. An unauthenticated remote attacker could exploit this flaw to disclose sensitive information from the heap memory or cause a denial of service (DoS) via a process crash. This issue has been fixed in version 0.10.6.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
neutrinolabs xrdp 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
neutrinolabs xrdp是neutrinolabs团队开源的一款开源远程桌面协议服务器。 neutrinolabs xrdp 0.10.6及之前版本存在数字错误漏洞，该漏洞源于在处理vnc-any连接模式中的屏幕更新消息时存在整数溢出，可能导致未经身份验证的远程攻击者利用特制图像尺寸导致内存缓冲区大小计算错误，造成越界读取，从而泄露堆内存敏感信息或通过进程崩溃导致拒绝服务。
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
neutrinolabs xrdp < 0.10.6.1 -

II. Public POCs for CVE-2026-41521

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 10598 chars
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III. Intelligence Information for CVE-2026-41521

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Vendor Advisories for CVE-2026-41521 (1)

Vendor Pages for CVE-2026-41521 (1)

Same Patch Batch · neutrinolabs · 2026-07-20 · 10 CVEs total

CVE-2026-41252 9.8 CRITICAL xrdp: lib_palette_update Heap Buffer Overflow & RCE
CVE-2026-44178 8.8 HIGH xrdp: Channel Data Forwarding Fixed-Size Buffer Overflow
CVE-2026-55626 8.0 HIGH xrdp: No authentication required with Xvnc backend on RHEL 9
CVE-2026-54538 7.5 HIGH xrdp: Pre-auth infinite loop via totalLength=0 in TS_SHARECONTROLHEADER
CVE-2026-55645 6.5 MEDIUM xrdp: Out-of-bounds read in Client Control PDU processing (xrdp_rdp_process_data_control)
CVE-2026-42218 5.3 MEDIUM XRDP is vulnerable to a server timing attack, leading to user enumeration
CVE-2026-44978 5.3 MEDIUM xrdp: Unchecked FIPS padding length in standard RDP Security causes heap out-of-bounds rea
CVE-2026-55238 5.3 MEDIUM xrdp: Malformed Confirm Active capability sets cause out-of-bounds reads
CVE-2026-55639 5.3 MEDIUM xrdp: Out-of-bounds read in GCC Conference Create Request CS_SECURITY processing (xrdp_sec

IV. Related Vulnerabilities

Same product: xrdp
Same vendor: neutrinolabs
Same weakness: CWE-190

V. Comments for CVE-2026-41521

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