FreeRDP before 3.31.0 Out-of-bounds Read via Smartcard ATR

{
  "id": "82353e3e983798fb74a2f7d579ba1e1adf7218bc7e1666ed93a1cecf12737a0a",
  "url": "https://osv.dev/vulnerability/CVE-2026-91945",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "FreeRDP before 3.31.0 Out-of-bounds Read via Smartcard ATR",
    "summary": "FreeRDP versions before 3.31.0 contain an out-of-bounds read vulnerability in smartcard response decoders that fail to validate ATR length fields against fixed inline arrays. Authenticated RDP clients can send oversized ATR lengths in PAKID_CORE_DEVICE_IOCOMPLETION responses to trigger reads past stack or heap objects, causing process termination.",
    "evidence": "osv:CVE-2026-91945",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-91945",
      "aliases": [
        "CVE-2026-91945",
        "GHSA-q65v-4w7q-hx3r"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/freerdp/freerdp",
              "type": "GIT",
              "events": [
                {
                  "introduced": "5370fb26fbf034ecd11d3026b6ad639b5fff493f"
                },
                {
                  "fixed": "aa8650b300aa4cabd85d9c72b431301509b9043f"
                },
                {
                  "fixed": "9626564421df72c84f891afdbc0b20bf702f369f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "3.28.0"
                      },
                      {
                        "fixed": "3.31.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "9626564421df72c84f891afdbc0b20bf702f369f"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-91945.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:32.144256453Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91945.json",
        "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-q65v-4w7q-hx3r",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-91945",
        "https://www.vulncheck.com/advisories/freerdp-before-3.31.0-out-of-bounds-read-via-smartcard-atr",
        "https://github.com/FreeRDP/FreeRDP/commit/9626564421df72c84f891afdbc0b20bf702f369f"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-125"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91945.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-91945",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 498940,
  "published_at": "2026-09-15T15:18:04.458+00:00"
}