FKIE_CVE-2021-3736

Vulnerability from fkie_nvd - Published: 2022-08-23 16:15 - Updated: 2026-06-17 04:05
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Summary
A flaw was found in the Linux kernel. A memory leak problem was found in mbochs_ioctl in samples/vfio-mdev/mbochs.c in Virtual Function I/O (VFIO) Mediated devices. This flaw could allow a local attacker to leak internal kernel information.
References
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2021-3736Third Party Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1995570Issue Tracking, Third Party Advisory
secalert@redhat.comhttps://github.com/torvalds/linux/commit/de5494af4815a4c9328536c72741229b7de88e7fPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/security/cve/CVE-2021-3736Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=1995570Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/torvalds/linux/commit/de5494af4815a4c9328536c72741229b7de88e7fPatch, Third Party Advisory
Impacted products
Vendor Product Version
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "kernel",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "Fixed in v5.15-rc1"
            }
          ]
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "BBD585C2-3F95-4E2A-BD16-33C3A6211557",
              "versionEndIncluding": "5.14.20",
              "vulnerable": true
            }
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          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in the Linux kernel. A memory leak problem was found in mbochs_ioctl in samples/vfio-mdev/mbochs.c in Virtual Function I/O (VFIO) Mediated devices. This flaw could allow a local attacker to leak internal kernel information."
    },
    {
      "lang": "es",
      "value": "Se ha encontrado un fallo en el kernel de Linux. Se encontr\u00f3 un problema de p\u00e9rdida de memoria en la funci\u00f3n mbochs_ioctl en el archivo samples/vfio-mdev/mbochs.c en dispositivos mediados por Virtual Function I/O (VFIO). Este fallo podr\u00eda permitir a un atacante local filtrar informaci\u00f3n interna del kernel."
    }
  ],
  "id": "CVE-2021-3736",
  "lastModified": "2026-06-17T04:05:39.900",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2022-08-23T16:15:09.687",
  "references": [
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://access.redhat.com/security/cve/CVE-2021-3736"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Issue Tracking",
        "Third Party Advisory"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1995570"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
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      "url": "https://github.com/torvalds/linux/commit/de5494af4815a4c9328536c72741229b7de88e7f"
    },
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      "source": "af854a3a-2127-422b-91ae-364da2661108",
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      "tags": [
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        "Third Party Advisory"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1995570"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
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      "url": "https://github.com/torvalds/linux/commit/de5494af4815a4c9328536c72741229b7de88e7f"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-200"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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