FKIE_CVE-2021-46979

Vulnerability from fkie_nvd - Published: 2024-02-28 09:15 - Updated: 2024-12-31 16:02
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: iio: core: fix ioctl handlers removal Currently ioctl handlers are removed twice. For the first time during iio_device_unregister() then later on inside iio_device_unregister_eventset() and iio_buffers_free_sysfs_and_mask(). Double free leads to kernel panic. Fix this by not touching ioctl handlers list directly but rather letting code responsible for registration call the matching cleanup routine itself.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/11e1cae5da4096552f7c091476cbadbc0d1817daPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/901f84de0e16bde10a72d7eb2f2eb73fcde8fa1aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ab6c935ba3a04317632f3b8b68675bdbaf395303Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/11e1cae5da4096552f7c091476cbadbc0d1817daPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/901f84de0e16bde10a72d7eb2f2eb73fcde8fa1aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ab6c935ba3a04317632f3b8b68675bdbaf395303Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.13
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "83B53E9A-F426-4C03-9A5F-A931FF79827E",
              "versionEndExcluding": "5.11.22",
              "versionStartIncluding": "5.11",
              "vulnerable": true
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: core: fix ioctl handlers removal\n\nCurrently ioctl handlers are removed twice. For the first time during\niio_device_unregister() then later on inside\niio_device_unregister_eventset() and iio_buffers_free_sysfs_and_mask().\nDouble free leads to kernel panic.\n\nFix this by not touching ioctl handlers list directly but rather\nletting code responsible for registration call the matching cleanup\nroutine itself."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: iio: core: arreglar la eliminaci\u00f3n de los controladores ioctl Actualmente, los controladores ioctl se eliminan dos veces. Por primera vez durante iio_device_unregister() y luego dentro de iio_device_unregister_eventset() y iio_buffers_free_sysfs_and_mask(). La doble liberaci\u00f3n conduce al p\u00e1nico en el kernel. Para solucionar este problema, no toque directamente la lista de controladores ioctl, sino que permita que el c\u00f3digo responsable del registro llame a la rutina de limpieza coincidente."
    }
  ],
  "id": "CVE-2021-46979",
  "lastModified": "2024-12-31T16:02:49.137",
  "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"
      }
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  "published": "2024-02-28T09:15:37.230",
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-415"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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