ghsa-grf9-28h9-xvhf
Vulnerability from github
Published
2024-10-21 21:30
Modified
2024-11-08 18:30
Severity ?
7.0 (High) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Details

In the Linux kernel, the following vulnerability has been resolved:

ntb: ntb_hw_switchtec: Fix use after free vulnerability in switchtec_ntb_remove due to race condition

In the switchtec_ntb_add function, it can call switchtec_ntb_init_sndev function, then &sndev->check_link_status_work is bound with check_link_status_work. switchtec_ntb_link_notification may be called to start the work.

If we remove the module which will call switchtec_ntb_remove to make cleanup, it will free sndev through kfree(sndev), while the work mentioned above will be used. The sequence of operations that may lead to a UAF bug is as follows:

CPU0 CPU1

                    | check_link_status_work

switchtec_ntb_remove | kfree(sndev); | | if (sndev->link_force_down) | // use sndev

Fix it by ensuring that the work is canceled before proceeding with the cleanup in switchtec_ntb_remove.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-50059"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-10-21T20:15:18Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nntb: ntb_hw_switchtec: Fix use after free vulnerability in switchtec_ntb_remove due to race condition\n\nIn the switchtec_ntb_add function, it can call switchtec_ntb_init_sndev\nfunction, then \u0026sndev-\u003echeck_link_status_work is bound with\ncheck_link_status_work. switchtec_ntb_link_notification may be called\nto start the work.\n\nIf we remove the module which will call switchtec_ntb_remove to make\ncleanup, it will free sndev through kfree(sndev), while the work\nmentioned above will be used. The sequence of operations that may lead\nto a UAF bug is as follows:\n\nCPU0                                 CPU1\n\n                        | check_link_status_work\nswitchtec_ntb_remove    |\nkfree(sndev);           |\n                        | if (sndev-\u003elink_force_down)\n                        | // use sndev\n\nFix it by ensuring that the work is canceled before proceeding with\nthe cleanup in switchtec_ntb_remove.",
  "id": "GHSA-grf9-28h9-xvhf",
  "modified": "2024-11-08T18:30:47Z",
  "published": "2024-10-21T21:30:54Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50059"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/177925d9c8715a897bb79eca62628862213ba956"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3ae45be8492460a35b5aebf6acac1f1d32708946"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5126d8f5567f49b52e21fca320eaa97977055099"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/92728fceefdaa2a0a3aae675f86193b006eeaa43"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b650189687822b705711f0567a65a164a314d8df"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e51aded92d42784313ba16c12f4f88cc4f973bbb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fa840ba4bd9f3bad7f104e5b32028ee73af8b3dd"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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