Vulnerability details

CVE-2026-54538

neutrinolabs xrdp

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

CVSS 3.1

7.5High

Official description

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.

CVSS scores

Score	Version	Source	Vector
7.5High	3.1	CVEProject cvelistV5 (CNA) (GitHub_M)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`

Affected products

Vendor	Product	Versions	Source
neutrinolabs	xrdp	< 0.10.6.1	CVEProject cvelistV5 (CNA)

References and advisories

https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-9j3q-9mvw-qv7j x_refsource_CONFIRM
https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6.1 x_refsource_MISC

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Details

Published: 2026-07-20
Last updated: 2026-07-20
State: Published
Assigner (CNA): GitHub_M

Exploit prediction (EPSS)

0.67%

Probability of exploitation in 30 days

52.2%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: None
Technical impact: Partial

Weaknesses (CWE)

CWE-835
Loop with Unreachable Exit Condition ('Infinite Loop')