CVE-2022-50156

Estado: ModificadaAlta (7.8)—

In the Linux kernel, the following vulnerability has been resolved:

HID: cp2112: prevent a buffer overflow in cp2112_xfer()

Smatch warnings: drivers/hid/hid-cp2112.c:793 cp2112_xfer() error: __memcpy() 'data->block[1]' too small (33 vs 255) drivers/hid/hid-cp2112.c:793 cp2112_xfer() error: __memcpy() 'buf' too small (64 vs 255)

The 'read_length' variable is provided by 'data->block[0]' which comes from user and it(read_length) can take a value between 0-255. Add an upper bound to 'read_length' variable to prevent a buffer overflow in memcpy().

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 7.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.22%
Percentil entre todas las CVEs puntuadas: 11
Fecha de la puntuación: 5/10/2026

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1068 Exploitation for Privilege Escalationprivilege escalation85 %
Impacto principalT1059 Command and Scripting Interpreterexecution75 %

AV:L, PR:L sin UI permite escalada local; CWE-787 (buffer overflow) en cp2112_xfer() da ejecución de código con privilegios elevados (C:H, I:H, A:H).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Execution Prevention Threat Intelligence Program Restrict Web-Based Content Privileged Account Management Limit Software Installation Behavior Prevention on Endpoint

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

CWE-787

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2022-50156",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "542134c0375b5ca2b1d18490c02b8a20bfdd8d74",
              "lessThan": "3af7d60e9a6c17d6d41c4341f8020511887d372d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "542134c0375b5ca2b1d18490c02b8a20bfdd8d74",
              "lessThan": "519ff31a6ddd87aa4905bd9bf3b92e8b88801614",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "542134c0375b5ca2b1d18490c02b8a20bfdd8d74",
              "lessThan": "ebda3d6b004bb6127a66a616524a2de152302ca7",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "542134c0375b5ca2b1d18490c02b8a20bfdd8d74",
              "lessThan": "8489a20ac481b08c0391608d81ed3796d373cfdf",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "542134c0375b5ca2b1d18490c02b8a20bfdd8d74",
              "lessThan": "e7028944e61014ae915e7fb74963d3835f2f761a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "542134c0375b5ca2b1d18490c02b8a20bfdd8d74",
              "lessThan": "26e427ac85c2b8d0d108cc80b6de34d33e2780c4",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "542134c0375b5ca2b1d18490c02b8a20bfdd8d74",
              "lessThan": "381583845d19cb4bd21c8193449385f3fefa9caf",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/hid/hid-cp2112.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.15"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "4.15",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "4.19.256",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "status": "unaffected",
              "version": "5.4.211",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "status": "unaffected",
              "version": "5.10.137",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.61",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "5.18.18",
              "versionType": "semver",
              "lessThanOrEqual": "5.18.*"
            },
            {
              "status": "unaffected",
              "version": "5.19.2",
              "versionType": "semver",
              "lessThanOrEqual": "5.19.*"
            },
            {
              "status": "unaffected",
              "version": "6.0",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/hid/hid-cp2112.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-06-18T11:15:45.747",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/26e427ac85c2b8d0d108cc80b6de34d33e2780c4",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/381583845d19cb4bd21c8193449385f3fefa9caf",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3af7d60e9a6c17d6d41c4341f8020511887d372d",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/519ff31a6ddd87aa4905bd9bf3b92e8b88801614",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8489a20ac481b08c0391608d81ed3796d373cfdf",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e7028944e61014ae915e7fb74963d3835f2f761a",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ebda3d6b004bb6127a66a616524a2de152302ca7",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: cp2112: prevent a buffer overflow in cp2112_xfer()\n\nSmatch warnings:\ndrivers/hid/hid-cp2112.c:793 cp2112_xfer() error: __memcpy()\n'data->block[1]' too small (33 vs 255)\ndrivers/hid/hid-cp2112.c:793 cp2112_xfer() error: __memcpy() 'buf' too\nsmall (64 vs 255)\n\nThe 'read_length' variable is provided by 'data->block[0]' which comes\nfrom user and it(read_length) can take a value between 0-255. Add an\nupper bound to 'read_length' variable to prevent a buffer overflow in\nmemcpy()."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: HID: cp2112: evitar un desbordamiento de búfer en cp2112_xfer() Advertencias de Smatch: drivers/hid/hid-cp2112.c:793 Error de cp2112_xfer(): __memcpy() 'data-&gt;block[1]' demasiado pequeño (33 frente a 255) drivers/hid/hid-cp2112.c:793 Error de cp2112_xfer(): __memcpy() 'buf' demasiado pequeño (64 frente a 255) La variable 'read_length' la proporciona 'data-&gt;block[0]', que proviene del usuario, y puede tomar un valor entre 0 y 255. Añada un límite superior a la variable 'read_length' para evitar un desbordamiento de búfer en memcpy()."
    }
  ],
  "lastModified": "2026-08-04T10:18:06.150",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3DEB3209-65EF-4ABE-99F9-60C53FF4046D",
              "versionEndExcluding": "4.19.256",
              "versionStartIncluding": "4.15.1"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B1C63D19-C08C-4308-A848-B2523C9275BD",
              "versionEndExcluding": "5.4.211",
              "versionStartIncluding": "4.20"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C2BF720F-C5EE-4DE2-9BDF-CE4CFBC767F4",
              "versionEndExcluding": "5.10.137",
              "versionStartIncluding": "5.5"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "51861563-7F40-460F-82CD-2D3FBDAD6618",
              "versionEndExcluding": "5.15.61",
              "versionStartIncluding": "5.11"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5B42E453-8837-49D0-A5EF-03F818A6DC11",
              "versionEndExcluding": "5.18.18",
              "versionStartIncluding": "5.16"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A1A2A5A5-4598-4D7E-BA07-4660398D6C8F",
              "versionEndExcluding": "5.19.2",
              "versionStartIncluding": "5.19"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:4.15:-:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3B4D39AF-668B-442B-8085-639A6D4FA5AC"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:4.15:rc6:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "639D2465-65E0-40E2-B7A8-BEA9E221DE54"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:4.15:rc7:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A282AD0B-2D63-4F05-8F89-109A0975B423"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:4.15:rc8:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "30358221-183C-4699-994E-AF51F5D534FC"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:4.15:rc9:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A5ED80A8-E656-4AE9-921B-C22402C94A4C"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}