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

{
  "id": "727e5533a5d415b2574a29134d5795ef45f89833a789d9e2550b911e8a3f6d95",
  "url": "https://osv.dev/vulnerability/CVE-2026-55645",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "xrdp: Out-of-bounds read in Client Control PDU processing (xrdp_rdp_process_data_control)",
    "summary": "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.",
    "evidence": "osv:CVE-2026-55645",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-55645",
      "aliases": [
        "CVE-2026-55645",
        "GHSA-3m4m-h22g-c7xx"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/neutrinolabs/xrdp",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "80c52879fead585d6347df5b3c587718adf8f5a5"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.10.6.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "80c52879fead585d6347df5b3c587718adf8f5a5"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v0.10.6.1"
                  },
                  {
                    "cpe": "cpe:2.3:a:neutrinolabs:xrdp:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.10.6.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.10.6.1-rc.1",
            "v0.10.6",
            "v0.10.5",
            "v0.10.4.1",
            "v0.10.4",
            "v0.10.3",
            "v0.10.2",
            "v0.10.2-rc.1",
            "v0.10.1",
            "v0.10.0",
            "v0.10.0-beta.3",
            "v0.10.0-beta.2",
            "v0.10.0-beta.1",
            "v0.9.18",
            "v0.9.17",
            "v0.9.16",
            "v0.9.15",
            "v0.9.14",
            "v0.9.13",
            "v0.9.12",
            "v0.9.11",
            "v0.9.10",
            "v0.9.9",
            "v0.9.8",
            "v0.9.7",
            "v0.9.6",
            "v0.9.5",
            "v0.9.4",
            "v0.9.4.rc1",
            "v0.9.3",
            "v0.9.3.rc1",
            "v0.9.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55645.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:51.474841085Z",
      "provider": "osv",
      "references": [
        "https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6.1",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55645.json",
        "https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-3m4m-h22g-c7xx",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-55645"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-125"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55645.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-55645",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 520360,
  "published_at": "2026-07-20T16:51:59.14+00:00"
}