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FKIE_CVE-2021-47087

Vulnerability from fkie_nvd - Published: 2024-03-04 18:15 - Updated: 2026-08-04 10:16
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: tee: optee: Fix incorrect page free bug Pointer to the allocated pages (struct page *page) has already progressed towards the end of allocation. It is incorrect to perform __free_pages(page, order) using this pointer as we would free any arbitrary pages. Fix this by stop modifying the page pointer.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/18549bf4b21c739a9def39f27dcac53e27286ab5Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/806142c805cacd098e61bdc0f72c778a2389fe4aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/91e94e42f6fc49635f1a16d8ae3f79552bcfda29Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ad338d825e3f7b96ee542bf313728af2d19fe9adPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/18549bf4b21c739a9def39f27dcac53e27286ab5Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/806142c805cacd098e61bdc0f72c778a2389fe4aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/91e94e42f6fc49635f1a16d8ae3f79552bcfda29Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ad338d825e3f7b96ee542bf313728af2d19fe9adPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.16
linux linux_kernel 5.16
linux linux_kernel 5.16
linux linux_kernel 5.16
linux linux_kernel 5.16
linux linux_kernel 5.16
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/tee/optee/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "806142c805cacd098e61bdc0f72c778a2389fe4a",
              "status": "affected",
              "version": "3c712f14d8a9354a8807c15c64c8dd334499cc42",
              "versionType": "git"
            },
            {
              "lessThan": "ad338d825e3f7b96ee542bf313728af2d19fe9ad",
              "status": "affected",
              "version": "1340dc3fb75ea69221f4f5dcb0cbace55ad0331c",
              "versionType": "git"
            },
            {
              "lessThan": "91e94e42f6fc49635f1a16d8ae3f79552bcfda29",
              "status": "affected",
              "version": "ec185dd3ab257dc2a60953fdf1b6622f524cc5b7",
              "versionType": "git"
            },
            {
              "lessThan": "18549bf4b21c739a9def39f27dcac53e27286ab5",
              "status": "affected",
              "version": "ec185dd3ab257dc2a60953fdf1b6622f524cc5b7",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "255e17923b22cb7abd026e044416d61f6bd0eec0",
              "versionType": "git"
            },
            {
              "lessThan": "5.4.169",
              "status": "affected",
              "version": "5.4.140",
              "versionType": "semver"
            },
            {
              "lessThan": "5.10.89",
              "status": "affected",
              "version": "5.10.58",
              "versionType": "semver"
            },
            {
              "lessThan": "5.14",
              "status": "affected",
              "version": "5.13.10",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/tee/optee/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.14"
            },
            {
              "lessThan": "5.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.169",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.89",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.12",
              "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": "BD9286B3-E302-41A2-8F05-3280C4D48A3D",
              "versionEndExcluding": "5.4.169",
              "versionStartIncluding": "5.4.140",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B7AF1F06-B296-4122-83D6-FBDD3435C287",
              "versionEndExcluding": "5.10.89",
              "versionStartIncluding": "5.10.58",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "901A6B90-4B30-4E61-9B88-844D6E11AE47",
              "versionEndExcluding": "5.15.12",
              "versionStartIncluding": "5.14",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "357AA433-37E8-4323-BFB2-3038D6E4B414",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "A73429BA-C2D9-4D0C-A75F-06A1CA8B3983",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "F621B5E3-E99D-49E7-90B9-EC3B77C95383",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc4:*:*:*:*:*:*",
              "matchCriteriaId": "F7BFDCAA-1650-49AA-8462-407DD593F94F",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc5:*:*:*:*:*:*",
              "matchCriteriaId": "6EC9882F-866D-4ACB-8FBC-213D8D8436C8",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc6:*:*:*:*:*:*",
              "matchCriteriaId": "8A0915FE-A4AA-4C94-B783-CF29D81E7E54",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntee: optee: Fix incorrect page free bug\n\nPointer to the allocated pages (struct page *page) has already\nprogressed towards the end of allocation. It is incorrect to perform\n__free_pages(page, order) using this pointer as we would free any\narbitrary pages. Fix this by stop modifying the page pointer."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: tee: optee: corrige el error de liberaci\u00f3n de p\u00e1gina incorrecta. El puntero a las p\u00e1ginas asignadas (p\u00e1gina de estructura *p\u00e1gina) ya ha avanzado hacia el final de la asignaci\u00f3n. Es incorrecto ejecutar __free_pages(page, order) usando este puntero ya que liberar\u00edamos p\u00e1ginas arbitrarias. Solucione este problema dejando de modificar el puntero de la p\u00e1gina."
    }
  ],
  "id": "CVE-2021-47087",
  "lastModified": "2026-08-04T10:16:44.987",
  "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-2021-47087",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-03-06T20:26:26.296406Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-03-04T18:15:07.457",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/18549bf4b21c739a9def39f27dcac53e27286ab5"
    },
    {
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    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/91e94e42f6fc49635f1a16d8ae3f79552bcfda29"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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      "url": "https://git.kernel.org/stable/c/ad338d825e3f7b96ee542bf313728af2d19fe9ad"
    },
    {
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    },
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      "url": "https://git.kernel.org/stable/c/806142c805cacd098e61bdc0f72c778a2389fe4a"
    },
    {
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      "tags": [
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      "url": "https://git.kernel.org/stable/c/91e94e42f6fc49635f1a16d8ae3f79552bcfda29"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
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      "url": "https://git.kernel.org/stable/c/ad338d825e3f7b96ee542bf313728af2d19fe9ad"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-763"
        }
      ],
      "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

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.


Detection rules are retrieved from Rulezet.


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.