Vulnerability-Lookup

UBUNTU-CVE-2026-55645 (CVE-2026-55645)

Vulnerability from osv_ubuntu – Published: 2026-07-20 17:18 – Updated: 2026-10-17 09:45 – Source website

Details

xrdp is an open source RDP server. Versions 0.10.6 and prior contain a vulnerability concerning the processing of Client Control PDUs. During the RDP connection sequence, the parser does not perform sufficient length validation before reading specific data fields from the network stream. A remote, unauthenticated attacker could potentially exploit this flaw by sending a specially crafted, truncated Client Control PDU. Due to missing bounds checks, the xrdp process may perform out-of-bounds memory reads, which can result in the termination of the service (Denial of Service). However, since xrdp forks a new process for each connection by default, an out-of-bounds read causing a process crash is unlikely to bring down the entire xrdp service.This issue has been fixed in version 0.10.6.1.

Severity

6.5 (Medium)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-55645	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-55645	REPORT
	https://github.com/neutrinolabs/xrdp/security/adv…	REPORT

JSON

To clipboard

{
  "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": "0.9.17-2ubuntu3.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "xrdp",
        "purl": "pkg:deb/ubuntu/xrdp@0.9.17-2ubuntu3.1?arch=source\u0026distro=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",
        "0.9.17-2ubuntu3.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "xrdp",
            "binary_version": "0.9.24-4ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "xrdp",
        "purl": "pkg:deb/ubuntu/xrdp@0.9.24-4ubuntu0.1?arch=source\u0026distro=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",
        "0.9.24-4ubuntu0.1"
      ]
    },
    {
      "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": "0.10.6.1-2ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.10",
        "name": "xrdp",
        "purl": "pkg:deb/ubuntu/xrdp@0.10.6.1-2ubuntu1?arch=source\u0026distro=stonking"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.10.1-4.1",
        "0.10.6.1-2ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "xrdp",
            "binary_version": "0.10.1-4.1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "xrdp",
        "purl": "pkg:deb/ubuntu/xrdp@0.10.1-4.1ubuntu0.1?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",
        "0.10.1-4.1ubuntu0.1"
      ]
    }
  ],
  "aliases": [],
  "details": "xrdp is an open source RDP server. Versions 0.10.6 and prior contain a vulnerability concerning the processing of Client Control PDUs. During the RDP connection sequence, the parser does not perform sufficient length validation before reading specific data fields from the network stream. A remote, unauthenticated attacker could potentially exploit this flaw by sending a specially crafted, truncated Client Control PDU. Due to missing bounds checks, the xrdp process may perform out-of-bounds memory reads, which can result in the termination of the service (Denial of Service). However, since xrdp forks a new process for each connection by default, an out-of-bounds read causing a process crash is unlikely to bring down the entire xrdp service.This issue has been fixed in version 0.10.6.1.",
  "id": "UBUNTU-CVE-2026-55645",
  "modified": "2026-10-17T09:45:55Z",
  "published": "2026-07-20T17:18:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-55645"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-55645"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-3m4m-h22g-c7xx"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-55645"
  ]
}

CVE-2026-55645 (GCVE-0-2026-55645)

Vulnerability from cvelistv5 – Published: 2026-07-20 16:51 – Updated: 2026-07-21 15:24

Title

xrdp: Out-of-bounds read in Client Control PDU processing (xrdp_rdp_process_data_control)

Summary

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-21 15:23 UTC

CWE

CWE-125 - Out-of-bounds Read

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7955 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/neutrinolabs/xrdp/security/adv…	x_refsource_CONFIRM
https://github.com/neutrinolabs/xrdp/releases/tag…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
neutrinolabs	xrdp	Affected: < 0.10.6.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-55645",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-21T15:23:55.354517Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-21T15:24:45.532Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "xrdp",
          "vendor": "neutrinolabs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.10.6.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "xrdp is an open source RDP server. Versions 0.10.6 and prior contain a vulnerability concerning the processing of Client Control PDUs. During the RDP connection sequence, the parser does not perform sufficient length validation before reading specific data fields from the network stream. A remote, unauthenticated attacker could potentially exploit this flaw by sending a specially crafted, truncated Client Control PDU. Due to missing bounds checks, the xrdp process may perform out-of-bounds memory reads, which can result in the termination of the service (Denial of Service). However, since xrdp forks a new process for each connection by default, an out-of-bounds read causing a process crash is unlikely to bring down the entire xrdp service.This issue has been fixed in version 0.10.6.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-125",
              "description": "CWE-125: Out-of-bounds Read",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-20T16:51:59.140Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-3m4m-h22g-c7xx",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-3m4m-h22g-c7xx"
        },
        {
          "name": "https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6.1"
        }
      ],
      "source": {
        "advisory": "GHSA-3m4m-h22g-c7xx",
        "discovery": "UNKNOWN"
      },
      "title": "xrdp: Out-of-bounds read in Client Control PDU processing (xrdp_rdp_process_data_control)"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-55645",
    "datePublished": "2026-07-20T16:51:59.140Z",
    "dateReserved": "2026-06-16T23:52:12.058Z",
    "dateUpdated": "2026-07-21T15:24:45.532Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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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.
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