CVE-2026-40338

{
  "id": "CVE-2026-40338",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-18T00:16:37.810",
  "lastModified": "2026-10-26T22:10:00.163",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "libgphoto2 is a camera access and control library. Versions up to and including 2.5.33 have an out-of-bounds read in the PTP_DPFF_Enumeration case of `ptp_unpack_Sony_DPD()` in `camlibs/ptp2/ptp-pack.c` (line 856). The function reads a 2-byte enumeration count N via `dtoh16o(data, *poffset)` without verifying that 2 bytes remain in the buffer. The standard `ptp_unpack_DPD()` at line 704 has this exact check, confirming the Sony variant omitted it by oversight. Commit 3b9f9696be76ae51dca983d9dd8ce586a2561845 fixes the issue."
    },
    {
      "lang": "es",
      "value": "libgphoto2 es una biblioteca de acceso y control de cámaras. Las versiones hasta la 2.5.33 inclusive tienen una lectura fuera de límites en el caso PTP_DPFF_Enumeration de ’ptp_unpack_Sony_DPD()’ en ’camlibs/ptp2/ptp-pack.c’ (línea 856). La función lee un recuento de enumeración N de 2 bytes a través de ’dtoh16o(data, poffset)’ sin verificar que queden 2 bytes en el búfer. La función estándar ’ptp_unpack_DPD()’ en la línea 704 tiene esta verificación exacta, lo que confirma que la variante de Sony lo omitió por descuido. El commit 3b9f9696be76ae51dca983d9dd8ce586a2561845 soluciona el problema."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "gphoto",
          "product": "libgphoto2",
          "versions": [
            {
              "version": "<= 2.5.33",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L",
          "baseScore": 5.2,
          "baseSeverity": "MEDIUM",
          "attackVector": "PHYSICAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 0.9,
        "impactScore": 4.2
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-20T16:13:41.644804Z",
          "id": "CVE-2026-40338",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/gphoto/libgphoto2/commit/3b9f9696be76ae51dca983d9dd8ce586a2561845",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/gphoto/libgphoto2/security/advisories/GHSA-2hwp-w84q-27hf",
      "source": "[email protected]"
    }
  ]
}