ubuntu-cve-2026-54538
Vulnerability from osv_ubuntu
Published
2026-07-20 17:17
Modified
2026-07-29 07:59
Summary
Details
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.
Severity
7.5 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "xrdp",
"binary_version": "0.6.0-1ubuntu0.1+esm3"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "xrdp",
"purl": "pkg:deb/ubuntu/xrdp@0.6.0-1ubuntu0.1+esm3?arch=source\u0026distro=esm-infra-legacy/trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.6.0-1",
"0.6.0-1ubuntu0.1",
"0.6.0-1ubuntu0.1+esm1",
"0.6.0-1ubuntu0.1+esm2",
"0.6.0-1ubuntu0.1+esm3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "xrdp",
"binary_version": "0.6.1-2ubuntu0.3+esm3"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "xrdp",
"purl": "pkg:deb/ubuntu/xrdp@0.6.1-2ubuntu0.3+esm3?arch=source\u0026distro=esm-apps/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.6.1-2",
"0.6.1-2ubuntu0.1",
"0.6.1-2ubuntu0.3",
"0.6.1-2ubuntu0.3+esm1",
"0.6.1-2ubuntu0.3+esm2",
"0.6.1-2ubuntu0.3+esm3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "xorgxrdp",
"binary_version": "0.9.5-2ubuntu0.1~esm3"
},
{
"binary_name": "xrdp",
"binary_version": "0.9.5-2ubuntu0.1~esm3"
},
{
"binary_name": "xrdp-pulseaudio-installer",
"binary_version": "0.9.5-2ubuntu0.1~esm3"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "xrdp",
"purl": "pkg:deb/ubuntu/xrdp@0.9.5-2ubuntu0.1~esm3?arch=source\u0026distro=esm-apps/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.9.1-9",
"0.9.4-1",
"0.9.4-2",
"0.9.4-3",
"0.9.4-4",
"0.9.4-5",
"0.9.5-1",
"0.9.5-1build1",
"0.9.5-2",
"0.9.5-2ubuntu0.1~esm1",
"0.9.5-2ubuntu0.1~esm2",
"0.9.5-2ubuntu0.1~esm3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "xrdp",
"binary_version": "0.9.12-1ubuntu0.1+esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "xrdp",
"purl": "pkg:deb/ubuntu/xrdp@0.9.12-1ubuntu0.1+esm2?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.9.9-1",
"0.9.12-1",
"0.9.12-1ubuntu0.1",
"0.9.12-1ubuntu0.1+esm1",
"0.9.12-1ubuntu0.1+esm2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "xrdp",
"binary_version": "0.9.17-2ubuntu3+esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:22.04:LTS",
"name": "xrdp",
"purl": "pkg:deb/ubuntu/xrdp@0.9.17-2ubuntu3+esm2?arch=source\u0026distro=esm-apps/jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.9.15-1ubuntu1",
"0.9.17-1",
"0.9.17-2",
"0.9.17-2ubuntu1",
"0.9.17-2ubuntu2",
"0.9.17-2ubuntu2+esm1",
"0.9.17-2ubuntu3",
"0.9.17-2ubuntu3+esm1",
"0.9.17-2ubuntu3+esm2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "xrdp",
"binary_version": "0.9.24-4ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:24.04:LTS",
"name": "xrdp",
"purl": "pkg:deb/ubuntu/xrdp@0.9.24-4ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.9.21.1-1",
"0.9.24-2",
"0.9.24-3",
"0.9.24-3build1",
"0.9.24-3build2",
"0.9.24-4",
"0.9.24-4ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "xrdp",
"binary_version": "0.10.1-3.1+deb13u1build0.25.10.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "xrdp",
"purl": "pkg:deb/ubuntu/xrdp@0.10.1-3.1+deb13u1build0.25.10.1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.10.1-3",
"0.10.1-3.1",
"0.10.1-3.1+deb13u1build0.25.10.1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "xrdp",
"binary_version": "0.10.1-4.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "xrdp",
"purl": "pkg:deb/ubuntu/xrdp@0.10.1-4.1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.10.1-3.1",
"0.10.1-4",
"0.10.1-4.1"
]
}
],
"aliases": [],
"details": "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.",
"id": "UBUNTU-CVE-2026-54538",
"modified": "2026-07-29T07:59:15Z",
"published": "2026-07-20T17:17:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-54538"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-54538"
},
{
"type": "REPORT",
"url": "https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-9j3q-9mvw-qv7j"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-54538"
]
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Loading…
Loading…