fkie_cve-2021-47058
Vulnerability from fkie_nvd
Published
2024-02-29 23:15
Modified
2024-12-10 17:54
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 

{
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  "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": "2024-12-10T17:54:27.030",
  "metrics": {
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          "attackVector": "LOCAL",
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          "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"
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        "impactScore": 5.9,
        "source": "nvd@nist.gov",
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  "published": "2024-02-29T23:15:07.640",
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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