« Volver al listado

CVE-2026-75758

Estado: AplazadaMedia (5.9)—

Uncontrolled Recursion vulnerability in the Elixir standard library allows an attacker who controls a list passed to inspect/1, List.to_string/1, or List.to_charlist/1 to exhaust a BEAM node's memory.

Inspect.List's charlist branch in lib/elixir/lib/inspect.ex classifies a list as a charlist using List.ascii_printable?/2, which examines only the first :printable_limit (4096 by default) elements, and then calls IO.chardata_to_string/1 on the whole term.

Leer descripción completaMostrar menos

A list whose printable prefix exceeds that limit but which contains a later element that is not a code point (an atom, an out-of-range integer, or an improper tail) is therefore mis-classified, and the conversion raises ArgumentError. That conversion runs inside List.to_string/1, whose rescue clause builds its message by interpolating inspect(list), which re-enters the same branch and raises again. The nested inspection is an argument to raise, so the recursion is not in tail position and every level is retained: the process stack grows monotonically while each cycle re-walks the list, until the process is killed by max_heap_size or, by default, the node runs out of memory. List.to_charlist/1 has the same rescue shape.

Below the printable limit the inner inspect/1 sees the invalid element within its counter and renders the list in ordinary bracket form, so a single ArgumentError is raised and no recursion occurs.

This issue affects elixir: from 1.15.0-rc.0 before 1.18.5, from 1.19.0-rc.0 before 1.19.6, and from 1.20.0-rc.0 before 1.20.4.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Ematia — ElixirAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-75758",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-75758",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-08-28T18:28:19.564474Z"
        }
      }
    ],
    "cvssMetricV40": [
      {
        "type": "Secondary",
        "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "cvssData": {
          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
          "baseScore": 5.9,
          "Automatable": "NOT_DEFINED",
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "exploitMaturity": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "privilegesRequired": "NONE",
          "subIntegrityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "vulnAvailabilityImpact": "HIGH",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "subConfidentialityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "confidentialityRequirement": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
        }
      }
    ]
  },
  "affected": [
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:elixir-lang:elixir:*:*:*:*:*:*:*:*"
          ],
          "repo": "https://github.com/elixir-lang/elixir",
          "vendor": "elixir-lang",
          "modules": [
            "'Elixir.Inspect.List'",
            "'Elixir.List'",
            "'Elixir.IO'"
          ],
          "product": "elixir",
          "versions": [
            {
              "status": "affected",
              "version": "1.15.0-rc.0",
              "lessThan": "1.18.5",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "1.19.0-rc.0",
              "lessThan": "1.19.6",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "1.20.0-rc.0",
              "lessThan": "1.20.4",
              "versionType": "semver"
            }
          ],
          "packageURL": "pkg:otp/elixir?repository_url=https:%2F%2Fgithub.com%2Felixir-lang%2Felixir&vcs_url=git%2Bhttps:%2F%2Fgithub.com%2Felixir-lang%2Felixir.git",
          "packageName": "elixir",
          "programFiles": [
            "lib/inspect.ex",
            "lib/list.ex",
            "lib/io.ex"
          ],
          "defaultStatus": "unaffected",
          "programRoutines": [
            {
              "name": "'Elixir.Inspect.List':inspect/2"
            },
            {
              "name": "'Elixir.List':to_string/1"
            },
            {
              "name": "'Elixir.List':to_charlist/1"
            },
            {
              "name": "'Elixir.List':ascii_printable?/2"
            },
            {
              "name": "'Elixir.IO':chardata_to_string/1"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:elixir-lang:elixir:*:*:*:*:*:*:*:*"
          ],
          "repo": "https://github.com/elixir-lang/elixir",
          "vendor": "elixir-lang",
          "modules": [
            "'Elixir.Inspect.List'",
            "'Elixir.List'",
            "'Elixir.IO'"
          ],
          "product": "elixir",
          "versions": [
            {
              "status": "affected",
              "changes": [
                {
                  "at": "1eff1acffd49bdcc0d7f57ca74c1603328eed68a",
                  "status": "unaffected"
                },
                {
                  "at": "5230d73968f1b4969d2a2646786fa6c71475f5cc",
                  "status": "unaffected"
                },
                {
                  "at": "a983c8c043b1fbf1d95df78a29149222dac2988c",
                  "status": "unaffected"
                },
                {
                  "at": "0bba5887577b1e328da825bd018815fdc519685a",
                  "status": "unaffected"
                }
              ],
              "version": "9718f2b90ce086ff8614d5782f4ec528495c98dd",
              "lessThan": "*",
              "versionType": "git"
            }
          ],
          "packageURL": "pkg:github/elixir-lang/elixir",
          "packageName": "elixir-lang/elixir",
          "programFiles": [
            "lib/elixir/lib/inspect.ex",
            "lib/elixir/lib/list.ex",
            "lib/elixir/lib/io.ex"
          ],
          "collectionURL": "https://github.com",
          "defaultStatus": "unaffected",
          "programRoutines": [
            {
              "name": "'Elixir.Inspect.List':inspect/2"
            },
            {
              "name": "'Elixir.List':to_string/1"
            },
            {
              "name": "'Elixir.List':to_charlist/1"
            },
            {
              "name": "'Elixir.List':ascii_printable?/2"
            },
            {
              "name": "'Elixir.IO':chardata_to_string/1"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-08-28T16:18:25.277",
  "references": [
    {
      "url": "https://cna.erlef.org/cves/CVE-2026-75758.html",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/elixir-lang/elixir/commit/0bba5887577b1e328da825bd018815fdc519685a",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/elixir-lang/elixir/commit/1eff1acffd49bdcc0d7f57ca74c1603328eed68a",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/elixir-lang/elixir/commit/5230d73968f1b4969d2a2646786fa6c71475f5cc",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/elixir-lang/elixir/commit/a983c8c043b1fbf1d95df78a29149222dac2988c",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/elixir-lang/elixir/security/advisories/GHSA-jf5q-v438-665c",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-75758",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/elixir-lang/elixir/security/advisories/GHSA-jf5q-v438-665c",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "description": [
        {
          "lang": "en",
          "value": "CWE-674"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Uncontrolled Recursion vulnerability in the Elixir standard library allows an attacker who controls a list passed to inspect/1, List.to_string/1, or List.to_charlist/1 to exhaust a BEAM node's memory.\n\nInspect.List's charlist branch in lib/elixir/lib/inspect.ex classifies a list as a charlist using List.ascii_printable?/2, which examines only the first :printable_limit (4096 by default) elements, and then calls IO.chardata_to_string/1 on the whole term. A list whose printable prefix exceeds that limit but which contains a later element that is not a code point (an atom, an out-of-range integer, or an improper tail) is therefore mis-classified, and the conversion raises ArgumentError. That conversion runs inside List.to_string/1, whose rescue clause builds its message by interpolating inspect(list), which re-enters the same branch and raises again. The nested inspection is an argument to raise, so the recursion is not in tail position and every level is retained: the process stack grows monotonically while each cycle re-walks the list, until the process is killed by max_heap_size or, by default, the node runs out of memory. List.to_charlist/1 has the same rescue shape.\n\nBelow the printable limit the inner inspect/1 sees the invalid element within its counter and renders the list in ordinary bracket form, so a single ArgumentError is raised and no recursion occurs.\n\nThis issue affects elixir: from 1.15.0-rc.0 before 1.18.5, from 1.19.0-rc.0 before 1.19.6, and from 1.20.0-rc.0 before 1.20.4."
    }
  ],
  "lastModified": "2026-09-01T21:15:00.147",
  "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
}