ghsa-mq6g-3vj7-6g88
Vulnerability from github
Published
2025-01-06 18:31
Modified
2025-01-08 00:30
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details

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

ublk: detach gendisk from ublk device if add_disk() fails

Inside ublk_abort_requests(), gendisk is grabbed for aborting all inflight requests. And ublk_abort_requests() is called when exiting the uring context or handling timeout.

If add_disk() fails, the gendisk may have been freed when calling ublk_abort_requests(), so use-after-free can be caused when getting disk's reference in ublk_abort_requests().

Fixes the bug by detaching gendisk from ublk device if add_disk() fails.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-56764"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-01-06T17:15:42Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nublk: detach gendisk from ublk device if add_disk() fails\n\nInside ublk_abort_requests(), gendisk is grabbed for aborting all\ninflight requests. And ublk_abort_requests() is called when exiting\nthe uring context or handling timeout.\n\nIf add_disk() fails, the gendisk may have been freed when calling\nublk_abort_requests(), so use-after-free can be caused when getting\ndisk\u0027s reference in ublk_abort_requests().\n\nFixes the bug by detaching gendisk from ublk device if add_disk() fails.",
  "id": "GHSA-mq6g-3vj7-6g88",
  "modified": "2025-01-08T00:30:49Z",
  "published": "2025-01-06T18:31:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-56764"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/75cd4005da5492129917a4a4ee45e81660556104"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7d680f2f76a3417fdfc3946da7471e81464f7b41"
    }
  ],
  "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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