FreeRDP 3.11.0 before 3.32.1 Reachable Assertion DoS via urb_isoch_transfer

{
  "id": "c900e1c4b5535d8def91f84bc324fd6e2ce3e34d52c1a0ab167a2f34f77bf77e",
  "url": "https://osv.dev/vulnerability/CVE-2026-109240",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "FreeRDP 3.11.0 before 3.32.1 Reachable Assertion DoS via urb_isoch_transfer",
    "summary": "FreeRDP 3.11.0 before 3.32.1 contains a reachable assertion vulnerability in urb_isoch_transfer that allows malicious RDP servers to crash clients by sending unvalidated OutputBufferSize values. Attackers can send a TS_URB_ISOCH_TRANSFER IN-direction request with OutputBufferSize above INT32_MAX over URBDRC, triggering an assertion in libusb_udev_isoch_transfer that terminates the client.",
    "evidence": "osv:CVE-2026-109240",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2026-109240",
      "aliases": [
        "CVE-2026-109240",
        "GHSA-9qqc-m43j-g4r2"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/freerdp/freerdp",
              "type": "GIT",
              "events": [
                {
                  "introduced": "4312666c8f89cb5464fc6e79423d1d7e33683ebe"
                },
                {
                  "fixed": "bf217a504e54cc719880c228e82353382cd7d4fa"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "3.11.0"
                      },
                      {
                        "fixed": "3.32.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "3.11.0"
                      },
                      {
                        "fixed": "3.32.1"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-109240.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:40.655266455Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109240.json",
        "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9qqc-m43j-g4r2",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-109240",
        "https://www.vulncheck.com/advisories/freerdp-3.11.0-before-3.32.1-reachable-assertion-dos-via-urb-isoch-transfer"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-617"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109240.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-109240",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 508053,
  "published_at": "2026-10-12T16:04:17.023+00:00"
}