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CVE-2021-38204

Status: ModifiedMedium (6.8)—

drivers/usb/host/max3421-hcd.c in the Linux kernel before 5.13.6 allows physically proximate attackers to cause a denial of service (use-after-free and panic) by removing a MAX-3421 USB device in certain situations.

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).

Affected technologies (2)

Debian — Debian LinuxLinux — Linux Kernel

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2021-38204",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4.6,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/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": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.8,
          "attackVector": "PHYSICAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:P/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": 0.9
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
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  ],
  "published": "2021-08-08T20:15:07.250",
  "references": [
    {
      "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.6",
      "tags": [
        "Mailing List",
        "Patch",
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
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      "url": "https://github.com/torvalds/linux/commit/b5fdf5c6e6bee35837e160c00ac89327bdad031b",
      "tags": [
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        "Third Party Advisory"
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      "source": "cve@mitre.org"
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    {
      "url": "https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
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      "source": "cve@mitre.org"
    },
    {
      "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.6",
      "tags": [
        "Mailing List",
        "Patch",
        "Vendor Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
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      "url": "https://github.com/torvalds/linux/commit/b5fdf5c6e6bee35837e160c00ac89327bdad031b",
      "tags": [
        "Patch",
        "Third Party Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "drivers/usb/host/max3421-hcd.c in the Linux kernel before 5.13.6 allows physically proximate attackers to cause a denial of service (use-after-free and panic) by removing a MAX-3421 USB device in certain situations."
    },
    {
      "lang": "es",
      "value": "El archivo drivers/usb/host/max3421-hcd.c en el kernel de Linux versiones anteriores a 5.13.6, permite a atacantes físicamente próximos causar una denegación de servicio (uso de memoria previamente liberada y pánico) al eliminar un dispositivo USB MAX-3421 en determinadas situaciones"
    }
  ],
  "lastModified": "2026-06-17T04:01:45.420",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "vulnerable": true,
              "matchCriteriaId": "7F553752-8EB5-48A9-A1AD-1463CE397231",
              "versionEndExcluding": "5.13.6"
            }
          ],
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
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          ],
          "operator": "OR"
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  "sourceIdentifier": "cve@mitre.org"
}