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CVE-2018-10191

Status: ModifiedCritical (9.8)—

In versions of mruby up to and including 1.4.0, an integer overflow exists in src/vm.c::mrb_vm_exec() when handling OP_GETUPVAR in the presence of deep scope nesting, resulting in a use-after-free. An attacker that can cause Ruby code to be run can use this to possibly execute arbitrary code.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (2)

Debian — Debian LinuxMruby — Mruby

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2018-10191",
  "cveTags": [],
  "metrics": {
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
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  "published": "2018-04-17T21:29:00.233",
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  "vulnStatus": "Modified",
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      "lang": "en",
      "value": "In versions of mruby up to and including 1.4.0, an integer overflow exists in src/vm.c::mrb_vm_exec() when handling OP_GETUPVAR in the presence of deep scope nesting, resulting in a use-after-free. An attacker that can cause Ruby code to be run can use this to possibly execute arbitrary code."
    },
    {
      "lang": "es",
      "value": "En las versiones de mruby hasta, e incluyendo, la versión 1.4.0, existe un desbordamiento de enteros en src/vm.c::mrb_vm_exec() al gestionar OP_GETUPVAR en presencia de una anidación profunda del ámbito, lo que resulta en un uso de memoria previamente liberada. Un atacante que pueda hacer que se ejecute código Ruby puede aprovecharse de esto para ejecutar código arbitrario."
    }
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  "lastModified": "2026-06-17T01:33:38.970",
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