GHSA-PCR5-V468-562J

Vulnerability from github – Published: 2024-05-21 15:31 – Updated: 2024-12-30 21:30
VLAI
Details

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.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2021-47235"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-21T15:15:12Z",
    "severity": "HIGH"
  },
  "details": "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.",
  "id": "GHSA-pcr5-v468-562j",
  "modified": "2024-12-30T21:30:45Z",
  "published": "2024-05-21T15:31:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47235"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0260916843cc74f3906acf8b6f256693e01530a2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/19f88ca68ccf8771276a606765239b167654f84a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1cafc540b7bf1b6a5a77dc000205fe337ef6eba6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/95deeb29d831e2fae608439e243e7a520611e7ea"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9cca0c2d70149160407bda9a9446ce0c29b6e6c6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b1ad283755095a4b9d1431aeb357d7df1a33d3bb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d11d79e52ba080ee567cb7d7eb42a5ade60a8130"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/db2bc3cfd2bc01621014d4f17cdfc74611f339c8"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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