« Back to list

CVE-2021-0396

Status: ModifiedCritical (9.8)—💥 PoC

In Builtins::Generate_ArgumentsAdaptorTrampoline of builtins-arm.cc and related files, there is a possible out of bounds write due to an incorrect bounds check. This could lead to remote code execution in an unprivileged process with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-8.1 Android-9 Android-10 Android-11Android ID: A-160610106

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).

💥 Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

⚠️ GitHub proofs of concept are not verified: some are fake or contain malware. Never run them outside an isolated lab.

Affected technologies (1)

Google — Android

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2021-0396",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "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"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security@android.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "Android",
          "versions": [
            {
              "status": "affected",
              "version": "Android-8.1 Android-9 Android-10 Android-11"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-03-10T16:15:16.327",
  "references": [
    {
      "url": "https://source.android.com/security/bulletin/2021-03-01",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "security@android.com"
    },
    {
      "url": "https://source.android.com/security/bulletin/2021-03-01",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In Builtins::Generate_ArgumentsAdaptorTrampoline of builtins-arm.cc and related files, there is a possible out of bounds write due to an incorrect bounds check. This could lead to remote code execution in an unprivileged process with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-8.1 Android-9 Android-10 Android-11Android ID: A-160610106"
    },
    {
      "lang": "es",
      "value": "En la función Builtins::Generate_ArgumentsAdaptorTrampoline del archivo builtins-arm.cc y archivos relacionados, se presenta una posible escritura fuera de límites debido a una comprobación incorrecta de límites. Esto podría conllevar a una ejecución de código remota en un proceso no privilegiado sin ser necesarios privilegios de ejecución adicionales. No es requerida una interacción del usuario para su explotación. Producto: Android, Versiones: Android-8.1 Android-9 Android-10 Android-11, ID de Android: A-160610106"
    }
  ],
  "lastModified": "2026-06-17T03:29:54.850",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:google:android:8.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B06BE74B-83F4-41A3-8AD3-2E6248F7B0B2"
            },
            {
              "criteria": "cpe:2.3:o:google:android:9.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8DFAAD08-36DA-4C95-8200-C29FE5B6B854"
            },
            {
              "criteria": "cpe:2.3:o:google:android:10.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D558D965-FA70-4822-A770-419E73BA9ED3"
            },
            {
              "criteria": "cpe:2.3:o:google:android:11.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "109DD7FD-3A48-4C3D-8E1A-4433B98E1E64"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security@android.com"
}