CVE-2015-2712

Status: ModifiedHigh (7.5)—

The asm.js implementation in Mozilla Firefox before 38.0 does not properly determine heap lengths during identification of cases in which bounds checking may be safely skipped, which allows remote attackers to trigger out-of-bounds write operations and possibly execute arbitrary code, or trigger out-of-bounds read operations and possibly obtain sensitive information from process memory, via crafted JavaScript.

CVSS

Version: 2.0
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Base score: 7.5

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 3.60%
Percentile among all scored CVEs: 89
Score date: 10/11/2026

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)

Mozilla — Firefox Opensuse — Opensuse

CWEs

CWE-119

References

Raw JSON (NVD)

Show

{
  "id": "CVE-2015-2712",
  "cveTags": [],
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        "source": "nvd@nist.gov",
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          "baseScore": 7.5,
          "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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        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
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  "published": "2015-05-14T10:59:05.350",
  "references": [
    {
      "url": "http://lists.opensuse.org/opensuse-updates/2015-05/msg00036.html",
      "source": "security@mozilla.org"
    },
    {
      "url": "http://www.mozilla.org/security/announce/2015/mfsa2015-50.html",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
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          "value": "CWE-119"
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      "value": "The asm.js implementation in Mozilla Firefox before 38.0 does not properly determine heap lengths during identification of cases in which bounds checking may be safely skipped, which allows remote attackers to trigger out-of-bounds write operations and possibly execute arbitrary code, or trigger out-of-bounds read operations and possibly obtain sensitive information from process memory, via crafted JavaScript."
    },
    {
      "lang": "es",
      "value": "La implementación asm.js en Mozilla Firefox anterior a 38.0 no determina correctamente las longitudes de la memoria dinámica durante la identificación de casos en que la comprobación de límites puede saltarse con seguridad, lo que permite a atacantes remotos provocar operaciones de escritura fuera de rango y posiblemente obtener información sensible de la memoria de procesos a través de JavaScript manipulado."
    }
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  "lastModified": "2026-06-17T00:24:35.953",
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