{
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "ffmpeg",
          "vendor": "ffmpeg",
          "versions": [
            {
              "status": "affected"
            }
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      "descriptions": [
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          "lang": "en",
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              "value": "\u003ch1\u003eHeap-buffer-overflow in EXIF writer for extra IFD tags | Pwno\u003c/h1\u003e\u003cdiv\u003e\u003cbr\u003e\u003c/div\u003eWe recently found a cool four-bytes heap-buffer-overflow in FFmpeg\u0027s `avcodec/exif` during the processing of IFDs _(Image File Directory)._ This affects `.png`, `.jpg`, `.webp`, `.avif` \u2026 the formats we use most often. The cause of this bug is very interesting, and I don\u2019t want to spoil it here; I want you to find out.\u003cbr\u003e\u003cbr\u003eIt\u2019s also a short in-depth dive of FFmpeg internal workings of EXIFs, something we use so often. So even if you\u2019re not really into memory bugs, this can be a cool way to learn how it works under the hood.\u003cbr\u003e\u003cdiv\u003e\u003cbr\u003e\u003c/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c/div\u003e\u003cbr\u003e"
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          "value": "Heap-buffer-overflow in EXIF writer for extra IFD tags | Pwno\n\n\nWe recently found a cool four-bytes heap-buffer-overflow in FFmpeg\u0027s `avcodec/exif` during the processing of IFDs _(Image File Directory)._ This affects `.png`, `.jpg`, `.webp`, `.avif` \u2026 the formats we use most often. The cause of this bug is very interesting, and I don\u2019t want to spoil it here; I want you to find out.\n\nIt\u2019s also a short in-depth dive of FFmpeg internal workings of EXIFs, something we use so often. So even if you\u2019re not really into memory bugs, this can be a cool way to learn how it works under the hood."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-100",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-100 Overflow Buffers"
            }
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        }
      ],
      "metrics": [
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          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 10,
            "baseSeverity": "CRITICAL",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "HIGH",
            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "HIGH",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
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          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
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      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-122",
              "description": "CWE-122 Heap-based Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "orgId": "00000000-0000-4000-9000-000000000000"
      },
      "references": [
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://bugs.pwno.io/0014"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/FFmpeg/FFmpeg/commit/4bfac71ecd96488dd2dcd5649e08edb039a17a8b"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Heap-buffer-overflow in EXIF writer for extra IFD tags",
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  "cveMetadata": {
    "assignerOrgId": "00000000-0000-4000-9000-000000000000",
    "datePublished": "2026-01-02T19:50:00.000Z",
    "dateUpdated": "2026-01-02T20:05:27.269877Z",
    "requesterUserId": "00000000-0000-4000-9000-000000000000",
    "serial": 1,
    "state": "PUBLISHED",
    "vulnId": "GCVE-1-2026-0002",
    "vulnerabilitylookup_history": [
      [
        "alexandre.dulaunoy@circl.lu",
        "2026-01-02T19:50:03.961640Z"
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        "alexandre.dulaunoy@circl.lu",
        "2026-01-02T19:53:50.510087Z"
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