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

Vulnerability from cvelistv5 – Published: 2026-07-20 16:51 – Updated: 2026-07-20 16:51
VLAI
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.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
CWE
Assigner
References
Impacted products
Vendor Product Version
neutrinolabs xrdp Affected: < 0.10.6.1
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "xrdp",
          "vendor": "neutrinolabs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.10.6.1"
            }
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        }
      ],
      "descriptions": [
        {
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          "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": "2026-07-20T16:51:59.140Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-55645\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-07-20T17:18:07.430\",\"lastModified\":\"2026-07-20T17:18:07.430\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"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.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"neutrinolabs\",\"product\":\"xrdp\",\"versions\":[{\"version\":\"\u003c 0.10.6.1\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":3.9,\"impactScore\":2.5}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-125\"}]}],\"references\":[{\"url\":\"https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6.1\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-3m4m-h22g-c7xx\",\"source\":\"security-advisories@github.com\"}]}}",
    "redhat_vex": {
      "current_release_date": "2026-07-20T21:34:18+00:00",
      "cve": "CVE-2026-55645",
      "id": "CVE-2026-55645",
      "initial_release_date": "2026-07-20T16:51:59.140000+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "xrdp: out-of-bounds read in client control PDU processing",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-55645.json",
      "version": "3"
    }
  }
}



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