fkie_cve-2022-49711
Vulnerability from fkie_nvd
Published
2025-02-26 07:01
Modified
2025-03-24 19:28
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: bus: fsl-mc-bus: fix KASAN use-after-free in fsl_mc_bus_remove() In fsl_mc_bus_remove(), mc->root_mc_bus_dev->mc_io is passed to fsl_destroy_mc_io(). However, mc->root_mc_bus_dev is already freed in fsl_mc_device_remove(). Then reference to mc->root_mc_bus_dev->mc_io triggers KASAN use-after-free. To avoid the use-after-free, keep the reference to mc->root_mc_bus_dev->mc_io in a local variable and pass to fsl_destroy_mc_io(). This patch needs rework to apply to kernels older than v5.15.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/161b68b0a728377aaa10a8e14c70e7734f3c9ff7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/928ea98252ad75118950941683893cf904541da9Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ccd1751092341ac120a961835211f9f2e3735963Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.19
linux linux_kernel 5.19


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "3E725C36-556D-45F1-9140-84626556BEC6",
              "versionEndExcluding": "5.15.49",
              "versionStartIncluding": "4.8",
              "vulnerable": true
            },
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              "versionEndExcluding": "5.18.6",
              "versionStartIncluding": "5.16",
              "vulnerable": true
            },
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              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbus: fsl-mc-bus: fix KASAN use-after-free in fsl_mc_bus_remove()\n\nIn fsl_mc_bus_remove(), mc-\u003eroot_mc_bus_dev-\u003emc_io is passed to\nfsl_destroy_mc_io(). However, mc-\u003eroot_mc_bus_dev is already freed in\nfsl_mc_device_remove(). Then reference to mc-\u003eroot_mc_bus_dev-\u003emc_io\ntriggers KASAN use-after-free. To avoid the use-after-free, keep the\nreference to mc-\u003eroot_mc_bus_dev-\u003emc_io in a local variable and pass to\nfsl_destroy_mc_io().\n\nThis patch needs rework to apply to kernels older than v5.15."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bus: fsl-mc-bus: arregla el use-after-free de KASAN en fsl_mc_bus_remove() En fsl_mc_bus_remove(), mc-\u0026gt;root_mc_bus_dev-\u0026gt;mc_io se pasa a fsl_destroy_mc_io(). Sin embargo, mc-\u0026gt;root_mc_bus_dev ya est\u00e1 liberado en fsl_mc_device_remove(). Entonces, la referencia a mc-\u0026gt;root_mc_bus_dev-\u0026gt;mc_io activa el use-after-free de KASAN. Para evitar el use-after-free, mant\u00e9n la referencia a mc-\u0026gt;root_mc_bus_dev-\u0026gt;mc_io en una variable local y p\u00e1sala a fsl_destroy_mc_io(). Este parche necesita ser redise\u00f1ado para que se aplique a kernels anteriores a la v5.15."
    }
  ],
  "id": "CVE-2022-49711",
  "lastModified": "2025-03-24T19:28:55.660",
  "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": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-02-26T07:01:46.893",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/161b68b0a728377aaa10a8e14c70e7734f3c9ff7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/928ea98252ad75118950941683893cf904541da9"
    },
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    }
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}


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