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CVE-2021-33655

Estado: ModificadaMedia (6.7)—

Cuando son enviados datos maliciosos al kernel mediante ioctl cmd FBIOPUT_VSCREENINFO, el kernel escribirá memoria fuera de límites

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 (2)

Debian — Debian LinuxLinux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-33655",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.7,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 0.8
      }
    ]
  },
  "affected": [
    {
      "source": "securities@openeuler.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "kernel",
          "versions": [
            {
              "status": "affected",
              "version": "5.18 5.19.0-rc1"
            }
          ]
        }
      ]
    }
  ],
  "published": "2022-07-18T15:15:07.990",
  "references": [
    {
      "url": "http://www.openwall.com/lists/oss-security/2022/07/19/2",
      "tags": [
        "Mailing List",
        "Patch",
        "Third Party Advisory"
      ],
      "source": "securities@openeuler.org"
    },
    {
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=086ff84617185393a0bbf25830c4f36412a7d3f4",
      "tags": [
        "Mailing List",
        "Patch",
        "Vendor Advisory"
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      "source": "securities@openeuler.org"
    },
    {
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      "tags": [
        "Mailing List",
        "Third Party Advisory"
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      "source": "securities@openeuler.org"
    },
    {
      "url": "https://www.debian.org/security/2022/dsa-5191",
      "tags": [
        "Third Party Advisory"
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      "source": "securities@openeuler.org"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2022/07/19/2",
      "tags": [
        "Mailing List",
        "Patch",
        "Third Party Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
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      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=086ff84617185393a0bbf25830c4f36412a7d3f4",
      "tags": [
        "Mailing List",
        "Patch",
        "Vendor Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
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      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.debian.org/security/2022/dsa-5191",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "securities@openeuler.org",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "When sending malicous data to kernel by ioctl cmd FBIOPUT_VSCREENINFO,kernel will write memory out of bounds."
    },
    {
      "lang": "es",
      "value": "Cuando son enviados datos maliciosos al kernel mediante ioctl cmd FBIOPUT_VSCREENINFO, el kernel escribirá memoria fuera de límites"
    }
  ],
  "lastModified": "2026-06-17T03:54:58.330",
  "configurations": [
    {
      "nodes": [
        {
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}