fkie_cve-2021-47235
Vulnerability from fkie_nvd
Published
2024-05-21 15:15
Modified
2024-12-30 19:06
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: net: ethernet: fix potential use-after-free in ec_bhf_remove static void ec_bhf_remove(struct pci_dev *dev) { ... struct ec_bhf_priv *priv = netdev_priv(net_dev); unregister_netdev(net_dev); free_netdev(net_dev); pci_iounmap(dev, priv->dma_io); pci_iounmap(dev, priv->io); ... } priv is netdev private data, but it is used after free_netdev(). It can cause use-after-free when accessing priv pointer. So, fix it by moving free_netdev() after pci_iounmap() calls.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0260916843cc74f3906acf8b6f256693e01530a2Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/19f88ca68ccf8771276a606765239b167654f84aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1cafc540b7bf1b6a5a77dc000205fe337ef6eba6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/95deeb29d831e2fae608439e243e7a520611e7eaPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9cca0c2d70149160407bda9a9446ce0c29b6e6c6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b1ad283755095a4b9d1431aeb357d7df1a33d3bbPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d11d79e52ba080ee567cb7d7eb42a5ade60a8130Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/db2bc3cfd2bc01621014d4f17cdfc74611f339c8Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0260916843cc74f3906acf8b6f256693e01530a2Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/19f88ca68ccf8771276a606765239b167654f84aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/1cafc540b7bf1b6a5a77dc000205fe337ef6eba6Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/95deeb29d831e2fae608439e243e7a520611e7eaPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/9cca0c2d70149160407bda9a9446ce0c29b6e6c6Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b1ad283755095a4b9d1431aeb357d7df1a33d3bbPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d11d79e52ba080ee567cb7d7eb42a5ade60a8130Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/db2bc3cfd2bc01621014d4f17cdfc74611f339c8Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.13
linux linux_kernel 5.13
linux linux_kernel 5.13
linux linux_kernel 5.13
linux linux_kernel 5.13
linux linux_kernel 5.13


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: fix potential use-after-free in ec_bhf_remove\n\nstatic void ec_bhf_remove(struct pci_dev *dev)\n{\n...\n\tstruct ec_bhf_priv *priv = netdev_priv(net_dev);\n\n\tunregister_netdev(net_dev);\n\tfree_netdev(net_dev);\n\n\tpci_iounmap(dev, priv-\u003edma_io);\n\tpci_iounmap(dev, priv-\u003eio);\n...\n}\n\npriv is netdev private data, but it is used\nafter free_netdev(). It can cause use-after-free when accessing priv\npointer. So, fix it by moving free_netdev() after pci_iounmap()\ncalls."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: ethernet: soluciona el posible use after free en ec_bhf_remove static void ec_bhf_remove(struct pci_dev *dev) { ... struct ec_bhf_priv *priv = netdev_priv(net_dev); anular el registro_netdev(net_dev); free_netdev(net_dev); pci_iounmap(dev, priv-\u0026gt;dma_io); pci_iounmap(dev, priv-\u0026gt;io); ... } priv son datos privados de netdev, pero se usan despu\u00e9s de free_netdev(). Puede causar use after free al acceder al puntero privado. Entonces, solucionelo moviendo free_netdev() despu\u00e9s de las llamadas a pci_iounmap()."
    }
  ],
  "id": "CVE-2021-47235",
  "lastModified": "2024-12-30T19:06:05.170",
  "metrics": {
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          "attackComplexity": "LOW",
          "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"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
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  "published": "2024-05-21T15:15:12.777",
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}


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