CVE-2026-62377

{
  "id": "CVE-2026-62377",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-18T22:17:03.167",
  "lastModified": "2026-10-22T16:09:59.560",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "libheif is a HEIF and AVIF file format decoder and encoder. In 1.23.0 and earlier, a crafted HEIF sequence accepted by heif_context_read_from_memory() can leave the context with no registered sequence tracks and crash when heif_context_get_track(ctx, 0) is called. HeifContext::get_track() in libheif/context.cc executes assert(has_sequence()) before its normal error handling, so assert-enabled builds abort instead of allowing the public wrapper in libheif/api/libheif/heif_sequences.cc to return null. In release builds, removing the assertion lets the track_id zero path dereference m_tracks.begin()->second on an empty map, which is undefined behavior and typically crashes. The issue is reachable through documented public APIs after parsing attacker-controlled bytes. This issue is fixed in version 1.23.1."
    },
    {
      "lang": "es",
      "value": "libheif es un decodificador y codificador de formato de archivo HEIF y AVIF. En la versión 1.23.0 y anteriores, una secuencia HEIF manipulada aceptada por heif_context_read_from_memory() puede dejar el contexto sin pistas de secuencia registradas y fallar cuando se llama a heif_context_get_track(ctx, 0). HeifContext::get_track() en libheif/context.cc ejecuta assert(has_sequence()) antes de su manejo de errores normal, por lo que las compilaciones con aserciones habilitadas abortan en lugar de permitir que el envoltorio público en libheif/api/libheif/heif_sequences.cc devuelva nulo. En las compilaciones de lanzamiento, eliminar la aserción permite que la ruta con track_id cero desreferencie m_tracks.begin()  ->  second en un mapa vacío, lo cual es un comportamiento indefinido y típicamente falla. El problema es alcanzable a través de APIs públicas documentadas después de analizar bytes controlados por el atacante. Este problema está solucionado en la versión 1.23.1."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "strukturag",
          "product": "libheif",
          "versions": [
            {
              "version": "< 1.23.1",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-19T18:03:45.406952Z",
          "id": "CVE-2026-62377",
          "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-617"
        },
        {
          "lang": "en",
          "value": "CWE-908"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/strukturag/libheif/commit/e1a0bc1c1ae74f8075eaca30a1cdb2b9bee698d3",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/strukturag/libheif/issues/1844",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/strukturag/libheif/releases/tag/v1.23.1",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-9ww4-9v47-m7pj",
      "source": "[email protected]"
    }
  ]
}