ghsa-2q9r-f82f-3g5x
Vulnerability from github
Published
2025-03-27 18:31
Modified
2025-03-27 18:31
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, bfq: fix uaf for bfqq in bic_set_bfqq()

After commit 64dc8c732f5c ("block, bfq: fix possible uaf for 'bfqq->bic'"), bic->bfqq will be accessed in bic_set_bfqq(), however, in some context bic->bfqq will be freed, and bic_set_bfqq() is called with the freed bic->bfqq.

Fix the problem by always freeing bfqq after bic_set_bfqq().

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{
  "affected": [],
  "aliases": [
    "CVE-2023-52983"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-03-27T17:15:45Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock, bfq: fix uaf for bfqq in bic_set_bfqq()\n\nAfter commit 64dc8c732f5c (\"block, bfq: fix possible uaf for \u0027bfqq-\u003ebic\u0027\"),\nbic-\u003ebfqq will be accessed in bic_set_bfqq(), however, in some context\nbic-\u003ebfqq will be freed, and bic_set_bfqq() is called with the freed\nbic-\u003ebfqq.\n\nFix the problem by always freeing bfqq after bic_set_bfqq().",
  "id": "GHSA-2q9r-f82f-3g5x",
  "modified": "2025-03-27T18:31:26Z",
  "published": "2025-03-27T18:31:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52983"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/511c922c5bf6c8a166bea826e702336bc2424140"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7f77f3dab5066a7c9da73d72d1eee895ff84a8d5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b600de2d7d3a16f9007fad1bdae82a3951a26af2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cb1876fc33af26d00efdd473311f1b664c77c44e"
    }
  ],
  "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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