FKIE_CVE-2021-47500

Vulnerability from fkie_nvd - Published: 2024-05-24 15:15 - Updated: 2026-08-04 10:17
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: iio: mma8452: Fix trigger reference couting The mma8452 driver directly assigns a trigger to the struct iio_dev. The IIO core when done using this trigger will call `iio_trigger_put()` to drop the reference count by 1. Without the matching `iio_trigger_get()` in the driver the reference count can reach 0 too early, the trigger gets freed while still in use and a use-after-free occurs. Fix this by getting a reference to the trigger before assigning it to the IIO device.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/094d513b78b1714113bc016684b8142382e071baPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/794c0898f6bf39a458655d5fb4af70ec43a5cfcbPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/acf0088ac073ca6e7f4cad6acac112177e08df5ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c43517071dfc9fce34f8f69dbb98a86017f6b739Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cd0082235783f814241a1c9483fb89e405f4f892Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/db12d95085367de8b0223929d1332731024441f1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f5deab10ced368c807866283f8b79144c4823be8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fb75cc4740d81264cd5bcb0e17d961d018a8be96Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/094d513b78b1714113bc016684b8142382e071baPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/794c0898f6bf39a458655d5fb4af70ec43a5cfcbPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/acf0088ac073ca6e7f4cad6acac112177e08df5ePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c43517071dfc9fce34f8f69dbb98a86017f6b739Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/cd0082235783f814241a1c9483fb89e405f4f892Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/db12d95085367de8b0223929d1332731024441f1Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f5deab10ced368c807866283f8b79144c4823be8Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/fb75cc4740d81264cd5bcb0e17d961d018a8be96Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.15
linux linux_kernel 5.15
linux linux_kernel 5.15
linux linux_kernel 5.15
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/iio/accel/mma8452.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "094d513b78b1714113bc016684b8142382e071ba",
              "status": "affected",
              "version": "ae6d9ce05691bf79694074db7c7da980080548af",
              "versionType": "git"
            },
            {
              "lessThan": "fb75cc4740d81264cd5bcb0e17d961d018a8be96",
              "status": "affected",
              "version": "ae6d9ce05691bf79694074db7c7da980080548af",
              "versionType": "git"
            },
            {
              "lessThan": "794c0898f6bf39a458655d5fb4af70ec43a5cfcb",
              "status": "affected",
              "version": "ae6d9ce05691bf79694074db7c7da980080548af",
              "versionType": "git"
            },
            {
              "lessThan": "f5deab10ced368c807866283f8b79144c4823be8",
              "status": "affected",
              "version": "ae6d9ce05691bf79694074db7c7da980080548af",
              "versionType": "git"
            },
            {
              "lessThan": "acf0088ac073ca6e7f4cad6acac112177e08df5e",
              "status": "affected",
              "version": "ae6d9ce05691bf79694074db7c7da980080548af",
              "versionType": "git"
            },
            {
              "lessThan": "db12d95085367de8b0223929d1332731024441f1",
              "status": "affected",
              "version": "ae6d9ce05691bf79694074db7c7da980080548af",
              "versionType": "git"
            },
            {
              "lessThan": "c43517071dfc9fce34f8f69dbb98a86017f6b739",
              "status": "affected",
              "version": "ae6d9ce05691bf79694074db7c7da980080548af",
              "versionType": "git"
            },
            {
              "lessThan": "cd0082235783f814241a1c9483fb89e405f4f892",
              "status": "affected",
              "version": "ae6d9ce05691bf79694074db7c7da980080548af",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/iio/accel/mma8452.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.2"
            },
            {
              "lessThan": "4.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.4.*",
              "status": "unaffected",
              "version": "4.4.295",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.293",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.165",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.85",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.16",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "3842D18A-DF7B-40A7-994E-E7606663CB16",
              "versionEndExcluding": "4.4.295",
              "versionStartIncluding": "4.2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "5D107324-F4B9-4146-BACC-391E95D41D67",
              "versionEndExcluding": "4.9.293",
              "versionStartIncluding": "4.5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "71B2A056-7541-4FF3-859E-C55955DDA2DD",
              "versionEndExcluding": "4.14.258",
              "versionStartIncluding": "4.10",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "CECDDE2F-DEEF-4D3A-85FF-6AEBA16D225B",
              "versionEndExcluding": "4.19.221",
              "versionStartIncluding": "4.15",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B1DD3148-41FC-42AC-96A5-F63D774A97A3",
              "versionEndExcluding": "5.4.165",
              "versionStartIncluding": "4.20",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "D9668578-08F7-4694-A86F-FCE448387A79",
              "versionEndExcluding": "5.10.85",
              "versionStartIncluding": "5.5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6664ACE2-F748-4AE5-B98B-58803B0B2C3E",
              "versionEndExcluding": "5.15.8",
              "versionStartIncluding": "5.11",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "E46C74C6-B76B-4C94-A6A4-FD2FFF62D644",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "60134C3A-06E4-48C1-B04F-2903732A4E56",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "0460DA88-8FE1-46A2-9DDA-1F1ABA552E71",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*",
              "matchCriteriaId": "AF55383D-4DF2-45DC-93F7-571F4F978EAB",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: mma8452: Fix trigger reference couting\n\nThe mma8452 driver directly assigns a trigger to the struct iio_dev. The\nIIO core when done using this trigger will call `iio_trigger_put()` to drop\nthe reference count by 1.\n\nWithout the matching `iio_trigger_get()` in the driver the reference count\ncan reach 0 too early, the trigger gets freed while still in use and a\nuse-after-free occurs.\n\nFix this by getting a reference to the trigger before assigning it to the\nIIO device."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: iio: mma8452: correcci\u00f3n del c\u00e1lculo de referencia del disparador El controlador mma8452 asigna directamente un disparador a la estructura iio_dev. El n\u00facleo de IIO, cuando termine de usar este activador, llamar\u00e1 a `iio_trigger_put()` para reducir el recuento de referencias en 1. Sin el `iio_trigger_get()` coincidente en el controlador, el recuento de referencias puede llegar a 0 demasiado pronto, el activador se libera mientras a\u00fan est\u00e1 en se produce un uso y un use-after-free. Solucione este problema obteniendo una referencia al disparador antes de asignarlo al dispositivo IIO."
    }
  ],
  "id": "CVE-2021-47500",
  "lastModified": "2026-08-04T10:17:06.060",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-47500",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-09-10T15:35:45.977945Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-05-24T15:15:09.900",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/094d513b78b1714113bc016684b8142382e071ba"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/794c0898f6bf39a458655d5fb4af70ec43a5cfcb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/acf0088ac073ca6e7f4cad6acac112177e08df5e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/c43517071dfc9fce34f8f69dbb98a86017f6b739"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/cd0082235783f814241a1c9483fb89e405f4f892"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/db12d95085367de8b0223929d1332731024441f1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/f5deab10ced368c807866283f8b79144c4823be8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/fb75cc4740d81264cd5bcb0e17d961d018a8be96"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/094d513b78b1714113bc016684b8142382e071ba"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/794c0898f6bf39a458655d5fb4af70ec43a5cfcb"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/acf0088ac073ca6e7f4cad6acac112177e08df5e"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/c43517071dfc9fce34f8f69dbb98a86017f6b739"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/cd0082235783f814241a1c9483fb89e405f4f892"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/db12d95085367de8b0223929d1332731024441f1"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/f5deab10ced368c807866283f8b79144c4823be8"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/fb75cc4740d81264cd5bcb0e17d961d018a8be96"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.