CVE-2026-32623— xrdp: Heap buffer overflow in NeutrinoRDP channel reassembly
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I. Basic Information for CVE-2026-32623
Vulnerability Information
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Vulnerability Title
xrdp: Heap buffer overflow in NeutrinoRDP channel reassembly
Source: NVD (National Vulnerability Database)
Vulnerability Description
xrdp is an open source RDP server. Versions through 0.10.5 contain a heap-based buffer overflow vulnerability in the NeutrinoRDP module. When proxying RDP sessions from xrdp to another server, the module fails to properly validate the size of reassembled fragmented virtual channel data against its allocated memory buffer. A malicious downstream RDP server (or an attacker capable of performing a Man-in-the-Middle attack) could exploit this flaw to cause memory corruption, potentially leading to a Denial of Service (DoS) or Remote Code Execution (RCE). The NeutrinoRDP module is not built by default. This vulnerability only affects environments where the module has been explicitly compiled and enabled. Users can verify if the module is built by checking for --enable-neutrinordp in the output of the xrdp -v command. This issue has been fixed in version 0.10.6.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
堆缓冲区溢出
Source: NVD (National Vulnerability Database)
Vulnerability Title
xrdp 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
xrdp是neutrinolabs开源的一款开源远程桌面协议服务器。 xrdp 0.10.5及之前版本存在安全漏洞，该漏洞源于NeutrinoRDP模块中存在基于堆的缓冲区溢出，可能导致内存损坏、拒绝服务或远程代码执行。
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 | - |
II. Public POCs for CVE-2026-32623
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|---|
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- Release xrdp v0.10.6 · neutrinolabs/xrdp · GitHubx_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-32623
Same Patch Batch · neutrinolabs · 2026-04-17 · 8 CVEs total
| CVE-2026-32107 | 8.8 HIGH | xrdp: Fail-open privilege drop in sesexec — child processes may execute as root if setuid |
| CVE-2026-33145 | 6.3 MEDIUM | xrdp: Authenticated RCE via unsanitized AlternateShell execution in xrdp-sesman |
| CVE-2026-35512 | xrdp: Heap buffer overflow in EGFX channel | |
| CVE-2026-32105 | xrdp: RDP MAC signature (dataSignature) never verified on receive — integrity bypass in no | |
| CVE-2026-32624 | xrdp: Heap buffer overflow in xrdp_sec_process_logon_info() via incorrect g_strncat length | |
| CVE-2026-33689 | xrdp: Pre-authentication out-of-bounds reads in channel parsers | |
| CVE-2026-33516 | xrdp: Pre-authentication out-of-bounds reads in RDP capability and channel parsers |
IV. Related Vulnerabilities
Same product: xrdp
- CVE-2026-35512
xrdp: Heap buffer overflow in EGFX channel - CVE-2026-33689
xrdp: Pre-authentication out-of-bounds reads in channel pars - CVE-2026-33145
xrdp: Authenticated RCE via unsanitized AlternateShell execu - CVE-2026-32624
xrdp: Heap buffer overflow in xrdp_sec_process_logon_info() - CVE-2026-33516
xrdp: Pre-authentication out-of-bounds reads in RDP capabili
Same vendor: neutrinolabs
- CVE-2026-35512
xrdp: Heap buffer overflow in EGFX channel - CVE-2026-33689
xrdp: Pre-authentication out-of-bounds reads in channel pars - CVE-2026-33145
xrdp: Authenticated RCE via unsanitized AlternateShell execu - CVE-2026-32624
xrdp: Heap buffer overflow in xrdp_sec_process_logon_info() - CVE-2026-33516
xrdp: Pre-authentication out-of-bounds reads in RDP capabili
Same weakness: CWE-122
- CVE-2026-8261
Squirrel sqobject.cpp Load heap-based overflow - CVE-2026-8213
OSGeo gdal Grid File GDapi.c GDSDfldsrch heap-based overflow - CVE-2026-8212
OSGeo gdal SWapi.c SWSDfldsrch heap-based overflow - CVE-2026-42309
Pillow: Heap buffer overflow with nested list coordinates - CVE-2026-45130
Vim: Heap Buffer Overflow in spell file loading
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