{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-55737",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-55737",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-27T15:13:54.699Z",
    "updatedAt": "2026-07-28T09:55:26.434Z",
    "importedAt": "2026-10-24T01:58:20.586Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "Heap pointer corruption via signed/unsigned mismatch in LARGE_TUPLE_EXT decoding in erts external term format decoder",
      "summary": "Signed to Unsigned Conversion Error and Out-of-bounds Write vulnerability in Erlang OTP erts allows an attacker who can supply a crafted Erlang external term format (ETF) binary to binary_to_term/1 to corrupt the BEAM heap pointer and crash the virtual machine.\n\nWhen decoding a LARGE_TUPLE_EXT term, the validation pass decoded_size() in erts/emulator/beam/external.c reads the 32-bit arity field as unsigned (get_uint32()), while the decode pass dec_term() reads the same field as a signed 32-bit integer (get_int32()) into an int. An arity wire value of 0x80000000 passes validation as 2147483648 but decodes as -2147483648, so the subsequent hp += n moves the heap allocation pointer backward. Neither pass enforces the runtime tuple-arity limit MAX_ARITYVAL. The result is an out-of-bounds heap write; in practice the VM detects an impossible heap size and aborts, denying service. The required padding is large when uncompressed but the compressed-ETF envelope shrinks it to a small payload on the wire.\n\nThis issue affects OTP from OTP 25.0 before OTP 29.0.4, OTP 28.5.0.4 and OTP 27.3.4.15, corresponding to erts from 13.0 before 17.0.4, 16.4.0.4 and 15.2.7.11.",
      "affected": [
        {
          "vendor": "Erlang",
          "product": "OTP",
          "packageName": "erts",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "13.0",
              "status": "affected",
              "versionType": "otp",
              "lessThan": "*",
              "changes": [
                {
                  "at": "17.0.4",
                  "status": "unaffected"
                },
                {
                  "at": "16.4.0.4",
                  "status": "unaffected"
                },
                {
                  "at": "15.2.7.11",
                  "status": "unaffected"
                }
              ]
            }
          ]
        },
        {
          "vendor": "Erlang",
          "product": "OTP",
          "packageName": "erlang/otp",
          "collectionURL": "https://github.com",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "25.0",
              "status": "affected",
              "versionType": "otp",
              "lessThan": "*",
              "changes": [
                {
                  "at": "29.0.4",
                  "status": "unaffected"
                },
                {
                  "at": "28.5.0.4",
                  "status": "unaffected"
                },
                {
                  "at": "27.3.4.15",
                  "status": "unaffected"
                }
              ]
            },
            {
              "version": "ebcbb97b4ec223464cac3d94375739a248ddef6e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c5210b42a9d3d96f3d25601942ce8122be0f3761"
            }
          ]
        }
      ]
    }
  }
}