ghsa-7xvf-m26j-25fw
Vulnerability from github
Published
2025-03-06 00:31
Modified
2025-03-06 00:31
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:

block: disable the elevator int del_gendisk

The elevator is only used for file system requests, which are stopped in del_gendisk. Move disabling the elevator and freeing the scheduler tags to the end of del_gendisk instead of doing that work in disk_release and blk_cleanup_queue to avoid a use after free on q->tag_set from disk_release as the tag_set might not be alive at that point.

Move the blk_qos_exit call as well, as it just depends on the elevator exit and would be the only reason to keep the not exactly cheap queue freeze in disk_release.

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49694"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-26T07:01:44Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: disable the elevator int del_gendisk\n\nThe elevator is only used for file system requests, which are stopped in\ndel_gendisk.  Move disabling the elevator and freeing the scheduler tags\nto the end of del_gendisk instead of doing that work in disk_release and\nblk_cleanup_queue to avoid a use after free on q-\u003etag_set from\ndisk_release as the tag_set might not be alive at that point.\n\nMove the blk_qos_exit call as well, as it just depends on the elevator\nexit and would be the only reason to keep the not exactly cheap queue\nfreeze in disk_release.",
  "id": "GHSA-7xvf-m26j-25fw",
  "modified": "2025-03-06T00:31:56Z",
  "published": "2025-03-06T00:31:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49694"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/50e34d78815e474d410f342fbe783b18192ca518"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f28699fafc047ec33299da01e928c3a0073c5cc6"
    }
  ],
  "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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