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CVE-2022-50758

Estado: AplazadaAlta (7.8)—

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

staging: vt6655: fix potential memory leak

In function device_init_td0_ring, memory is allocated for member td_info of priv->apTD0Rings[i], with i increasing from 0. In case of allocation failure, the memory is freed in reversed order, with i decreasing to 0. However, the case i=0 is left out and thus memory is leaked.

Modify the memory freeing loop to include the case i=0.

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).

🎯 Técnicas ATT&CK

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

Vulnerabilidad local (AV:L, PR:L) con fuga de memoria en el kernel de Linux que, explotada, podría causar DoS o escalada de privilegios. La fuga permite agotamiento de recursos del sistema.

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

Threat Intelligence ProgramFilter Network TrafficExecution PreventionApplication Isolation and SandboxingExploit ProtectionUpdate Software

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

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{
  "id": "CVE-2022-50758",
  "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
      }
    ]
  },
  "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": "5341ee0adb17d12a96dc5344e0d267cd12b52135",
              "lessThan": "e741e38aa98704fbb959650ecd270b71b2670680",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5341ee0adb17d12a96dc5344e0d267cd12b52135",
              "lessThan": "16a45e78a687eb6c69acc4e62b94b6508b0bfbda",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5341ee0adb17d12a96dc5344e0d267cd12b52135",
              "lessThan": "1b3cebeca99e8e0aa4fa57faac8dbf41e967317a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5341ee0adb17d12a96dc5344e0d267cd12b52135",
              "lessThan": "ff8551d411f12b5abc5ca929ab87643afa8a9588",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5341ee0adb17d12a96dc5344e0d267cd12b52135",
              "lessThan": "fb5f569bcda8f87bd47d8030bfae343d757fa3ea",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5341ee0adb17d12a96dc5344e0d267cd12b52135",
              "lessThan": "cfdf139258614ef65b0f68b857ada5328fb7c0e5",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5341ee0adb17d12a96dc5344e0d267cd12b52135",
              "lessThan": "c8ff91535880d41b49699b3829fb6151942de29e",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/staging/vt6655/device_main.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.18"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "4.18",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "4.19.262",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "status": "unaffected",
              "version": "5.4.220",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "status": "unaffected",
              "version": "5.10.150",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.75",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "5.19.17",
              "versionType": "semver",
              "lessThanOrEqual": "5.19.*"
            },
            {
              "status": "unaffected",
              "version": "6.0.3",
              "versionType": "semver",
              "lessThanOrEqual": "6.0.*"
            },
            {
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/staging/vt6655/device_main.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-12-24T13:16:02.563",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/16a45e78a687eb6c69acc4e62b94b6508b0bfbda",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/1b3cebeca99e8e0aa4fa57faac8dbf41e967317a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c8ff91535880d41b49699b3829fb6151942de29e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/cfdf139258614ef65b0f68b857ada5328fb7c0e5",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e741e38aa98704fbb959650ecd270b71b2670680",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/fb5f569bcda8f87bd47d8030bfae343d757fa3ea",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ff8551d411f12b5abc5ca929ab87643afa8a9588",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: vt6655: fix potential memory leak\n\nIn function device_init_td0_ring, memory is allocated for member\ntd_info of priv->apTD0Rings[i], with i increasing from 0. In case of\nallocation failure, the memory is freed in reversed order, with i\ndecreasing to 0. However, the case i=0 is left out and thus memory is\nleaked.\n\nModify the memory freeing loop to include the case i=0."
    }
  ],
  "lastModified": "2026-08-04T10:18:23.890",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}