FKIE_CVE-2021-47058

Vulnerability from fkie_nvd - Published: 2024-02-29 23:15 - Updated: 2026-06-17 04:16
Severity
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: regmap: set debugfs_name to NULL after it is freed There is a upstream commit cffa4b2122f5("regmap:debugfs: Fix a memory leak when calling regmap_attach_dev") that adds a if condition when create name for debugfs_name. With below function invoking logical, debugfs_name is freed in regmap_debugfs_exit(), but it is not created again because of the if condition introduced by above commit. regmap_reinit_cache() regmap_debugfs_exit() ... regmap_debugfs_init() So, set debugfs_name to NULL after it is freed.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2dc1554d5f0fdaf47cc5bea442b84b9226fea867Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b9e569ae1da3a113b3acee8703c94777fd20938aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c764e375ae647832de1ee73d43a4bb3ef8a8f43dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d8897f7b2283a500666c85ef06e820df38ed7b52Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e41a962f82e7afb5b1ee644f48ad0b3aee656268Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/eb949f891226c012138ffd9df90d1e509f428ae6Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/2dc1554d5f0fdaf47cc5bea442b84b9226fea867Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b9e569ae1da3a113b3acee8703c94777fd20938aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c764e375ae647832de1ee73d43a4bb3ef8a8f43dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d8897f7b2283a500666c85ef06e820df38ed7b52Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/e41a962f82e7afb5b1ee644f48ad0b3aee656268Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/eb949f891226c012138ffd9df90d1e509f428ae6Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/base/regmap/regmap-debugfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2dc1554d5f0fdaf47cc5bea442b84b9226fea867",
              "status": "affected",
              "version": "5b654b03007917f3f1015b2a5c288c1ea6ae8f65",
              "versionType": "git"
            },
            {
              "lessThan": "d8897f7b2283a500666c85ef06e820df38ed7b52",
              "status": "affected",
              "version": "480c5e9c7e4c76c01d5f1f7b73832d7b77e6b427",
              "versionType": "git"
            },
            {
              "lessThan": "eb949f891226c012138ffd9df90d1e509f428ae6",
              "status": "affected",
              "version": "c9698380b01aed3281160d3ab25749b57d6913b8",
              "versionType": "git"
            },
            {
              "lessThan": "c764e375ae647832de1ee73d43a4bb3ef8a8f43d",
              "status": "affected",
              "version": "cffa4b2122f5f3e53cf3d529bbc74651f95856d5",
              "versionType": "git"
            },
            {
              "lessThan": "b9e569ae1da3a113b3acee8703c94777fd20938a",
              "status": "affected",
              "version": "cffa4b2122f5f3e53cf3d529bbc74651f95856d5",
              "versionType": "git"
            },
            {
              "lessThan": "e41a962f82e7afb5b1ee644f48ad0b3aee656268",
              "status": "affected",
              "version": "cffa4b2122f5f3e53cf3d529bbc74651f95856d5",
              "versionType": "git"
            },
            {
              "lessThan": "4.19.191",
              "status": "affected",
              "version": "4.19.168",
              "versionType": "semver"
            },
            {
              "lessThan": "5.4.119",
              "status": "affected",
              "version": "5.4.90",
              "versionType": "semver"
            },
            {
              "lessThan": "5.10.37",
              "status": "affected",
              "version": "5.10.8",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/base/regmap/regmap-debugfs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.11"
            },
            {
              "lessThan": "5.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.191",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.119",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.37",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.11.*",
              "status": "unaffected",
              "version": "5.11.21",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.12.*",
              "status": "unaffected",
              "version": "5.12.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "12BBC180-E93E-467F-A88C-193868E50B5B",
              "versionEndExcluding": "4.19.191",
              "versionStartIncluding": "4.19.168",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "654180A0-0C0D-4CED-8729-870B4FD51987",
              "versionEndExcluding": "5.4.119",
              "versionStartIncluding": "5.4.90",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "0A6FDAFA-1BAD-4123-A35E-C5E1001D1565",
              "versionEndExcluding": "5.10.37",
              "versionStartIncluding": "5.10.8",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "8CBB94EC-EC33-4464-99C5-03E5542715F0",
              "versionEndExcluding": "5.11.21",
              "versionStartIncluding": "5.11",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "D8C7052F-1B7B-4327-9C2B-84EBF3243838",
              "versionEndExcluding": "5.12.4",
              "versionStartIncluding": "5.12",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nregmap: set debugfs_name to NULL after it is freed\n\nThere is a upstream commit cffa4b2122f5(\"regmap:debugfs:\nFix a memory leak when calling regmap_attach_dev\") that\nadds a if condition when create name for debugfs_name.\nWith below function invoking logical, debugfs_name is\nfreed in regmap_debugfs_exit(), but it is not created again\nbecause of the if condition introduced by above commit.\nregmap_reinit_cache()\n\tregmap_debugfs_exit()\n\t...\n\tregmap_debugfs_init()\nSo, set debugfs_name to NULL after it is freed."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: regmap: establece debugfs_name en NULL despu\u00e9s de liberarlo. Hay una confirmaci\u00f3n ascendente cffa4b2122f5(\"regmap:debugfs: corrige una p\u00e9rdida de memoria al llamar a regmap_attach_dev\") que agrega una condici\u00f3n if al crear nombre para debugfs_name. Con la siguiente funci\u00f3n que invoca l\u00f3gica, debugfs_name se libera en regmap_debugfs_exit(), pero no se vuelve a crear debido a la condici\u00f3n if introducida por la confirmaci\u00f3n anterior. regmap_reinit_cache() regmap_debugfs_exit() ... regmap_debugfs_init() Entonces, establezca debugfs_name en NULL despu\u00e9s de liberarlo."
    }
  ],
  "id": "CVE-2021-47058",
  "lastModified": "2026-06-17T04:16:20.450",
  "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": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-47058",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-03-01T15:52:46.074960Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-02-29T23:15:07.640",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/2dc1554d5f0fdaf47cc5bea442b84b9226fea867"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/b9e569ae1da3a113b3acee8703c94777fd20938a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/c764e375ae647832de1ee73d43a4bb3ef8a8f43d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d8897f7b2283a500666c85ef06e820df38ed7b52"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/e41a962f82e7afb5b1ee644f48ad0b3aee656268"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/eb949f891226c012138ffd9df90d1e509f428ae6"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/2dc1554d5f0fdaf47cc5bea442b84b9226fea867"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/b9e569ae1da3a113b3acee8703c94777fd20938a"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/c764e375ae647832de1ee73d43a4bb3ef8a8f43d"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d8897f7b2283a500666c85ef06e820df38ed7b52"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/e41a962f82e7afb5b1ee644f48ad0b3aee656268"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/eb949f891226c012138ffd9df90d1e509f428ae6"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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