7.5

CVE-2026-54538

xrdp: Pre-auth infinite loop via totalLength=0 in TS_SHARECONTROLHEADER

xrdp is an open source RDP server. In versions 0.10.6 and prior, a n issue was discovered where the software fails to properly validate the totalLength field within the RDP protocol control header during packet reception. An unauthenticated remote attacker can exploit this vulnerability by sending a specially crafted packet that forces the xrdp process or thread into an infinite, CPU-bound loop. Because the internal pointer fails to advance and the deadlock prevention mechanism is bypassed for specific protocol data unit types, the process consumes excessive CPU resources indefinitely. This can render the xrdp service unavailable and potentially lead to system-wide resource exhaustion if multiple malicious connections are established. This issue has been fixed in version 0.10.6.1.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Neutrinolabs ≫ Xrdp Version < 0.10.6.1
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.38% 0.31
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
security-advisories@github.com 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')

The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.

https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6.1
Release Notes
https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-9j3q-9mvw-qv7j
Vendor Advisory