FKIE_CVE-2021-47325

Vulnerability from fkie_nvd - Published: 2024-05-21 15:15 - Updated: 2026-06-17 04:17
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: iommu/arm-smmu: Fix arm_smmu_device refcount leak in address translation The reference counting issue happens in several exception handling paths of arm_smmu_iova_to_phys_hard(). When those error scenarios occur, the function forgets to decrease the refcount of "smmu" increased by arm_smmu_rpm_get(), causing a refcount leak. Fix this issue by jumping to "out" label when those error scenarios occur.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0f0c5ea09139777d90729d408b807021f2ea6492Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/43d1aaa1965f9b58035196dac49b1e1e6c9c25ebPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5f9741a9a91f25c89e04b408cd61e3ab050ce24bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7c8f176d6a3fa18aa0f8875da6f7c672ed2a8554Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b11220803ad14a2a880cc06d8e01fe2548cc85b0Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0f0c5ea09139777d90729d408b807021f2ea6492Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/43d1aaa1965f9b58035196dac49b1e1e6c9c25ebPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/5f9741a9a91f25c89e04b408cd61e3ab050ce24bPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/7c8f176d6a3fa18aa0f8875da6f7c672ed2a8554Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b11220803ad14a2a880cc06d8e01fe2548cc85b0Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/arm/arm-smmu/arm-smmu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b11220803ad14a2a880cc06d8e01fe2548cc85b0",
              "status": "affected",
              "version": "d4a44f0750bb9bf7c44c22444a482756b2344a79",
              "versionType": "git"
            },
            {
              "lessThan": "43d1aaa1965f9b58035196dac49b1e1e6c9c25eb",
              "status": "affected",
              "version": "d4a44f0750bb9bf7c44c22444a482756b2344a79",
              "versionType": "git"
            },
            {
              "lessThan": "0f0c5ea09139777d90729d408b807021f2ea6492",
              "status": "affected",
              "version": "d4a44f0750bb9bf7c44c22444a482756b2344a79",
              "versionType": "git"
            },
            {
              "lessThan": "5f9741a9a91f25c89e04b408cd61e3ab050ce24b",
              "status": "affected",
              "version": "d4a44f0750bb9bf7c44c22444a482756b2344a79",
              "versionType": "git"
            },
            {
              "lessThan": "7c8f176d6a3fa18aa0f8875da6f7c672ed2a8554",
              "status": "affected",
              "version": "d4a44f0750bb9bf7c44c22444a482756b2344a79",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/arm/arm-smmu/arm-smmu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.0"
            },
            {
              "lessThan": "5.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.134",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.12.*",
              "status": "unaffected",
              "version": "5.12.19",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.13.*",
              "status": "unaffected",
              "version": "5.13.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.14",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E8906CE9-ED5B-4D67-A356-65A3B757C7A7",
              "versionEndExcluding": "5.4.134",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "7C1E6FB6-53C8-4DC4-8AE5-93094BA39F62",
              "versionEndExcluding": "5.10.52",
              "versionStartIncluding": "5.5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "34C1A2F4-DD44-4CF1-8FD4-751A0D746A9E",
              "versionEndExcluding": "5.12.19",
              "versionStartIncluding": "5.11",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F93FA3CC-0C79-410B-A7D7-245C2AA0723A",
              "versionEndExcluding": "5.13.4",
              "versionStartIncluding": "5.13",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/arm-smmu: Fix arm_smmu_device refcount leak in address translation\n\nThe reference counting issue happens in several exception handling paths\nof arm_smmu_iova_to_phys_hard(). When those error scenarios occur, the\nfunction forgets to decrease the refcount of \"smmu\" increased by\narm_smmu_rpm_get(), causing a refcount leak.\n\nFix this issue by jumping to \"out\" label when those error scenarios\noccur."
    },
    {
      "lang": "es",
      "value": " En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: iommu/arm-smmu: corrige la fuga de recuento de referencias de arm_smmu_device en la traducci\u00f3n de direcciones. El problema de recuento de referencias ocurre en varias rutas de manejo de excepciones de arm_smmu_iova_to_phys_hard(). Cuando ocurren esos escenarios de error, la funci\u00f3n se olvida de disminuir el recuento de \"smmu\" aumentado en arm_smmu_rpm_get(), lo que provoca una fuga de recuento. Solucione este problema saltando a la etiqueta \"out\" cuando se produzcan esos escenarios de error."
    }
  ],
  "id": "CVE-2021-47325",
  "lastModified": "2026-06-17T04:17:12.083",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-47325",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-05-21T17:39:49.383659Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-05-21T15:15:19.613",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/0f0c5ea09139777d90729d408b807021f2ea6492"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/43d1aaa1965f9b58035196dac49b1e1e6c9c25eb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/5f9741a9a91f25c89e04b408cd61e3ab050ce24b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/7c8f176d6a3fa18aa0f8875da6f7c672ed2a8554"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/b11220803ad14a2a880cc06d8e01fe2548cc85b0"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/0f0c5ea09139777d90729d408b807021f2ea6492"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/43d1aaa1965f9b58035196dac49b1e1e6c9c25eb"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/5f9741a9a91f25c89e04b408cd61e3ab050ce24b"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/7c8f176d6a3fa18aa0f8875da6f7c672ed2a8554"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/b11220803ad14a2a880cc06d8e01fe2548cc85b0"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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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

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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.
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  • 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.


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