ghsa-mmqv-h65v-7p4p
Vulnerability from github
Published
2025-09-15 15:31
Modified
2025-09-15 15:31
Details

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

block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq

Commit 64dc8c732f5c ("block, bfq: fix possible uaf for 'bfqq->bic'") will access 'bic->bfqq' in bic_set_bfqq(), however, bfq_exit_icq_bfqq() can free bfqq first, and then call bic_set_bfqq(), which will cause uaf.

Fix the problem by moving bfq_exit_bfqq() behind bic_set_bfqq().

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{
  "affected": [],
  "aliases": [
    "CVE-2022-50329"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-15T15:15:45Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq\n\nCommit 64dc8c732f5c (\"block, bfq: fix possible uaf for \u0027bfqq-\u003ebic\u0027\")\nwill access \u0027bic-\u003ebfqq\u0027 in bic_set_bfqq(), however, bfq_exit_icq_bfqq()\ncan free bfqq first, and then call bic_set_bfqq(), which will cause uaf.\n\nFix the problem by moving bfq_exit_bfqq() behind bic_set_bfqq().",
  "id": "GHSA-mmqv-h65v-7p4p",
  "modified": "2025-09-15T15:31:27Z",
  "published": "2025-09-15T15:31:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50329"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1425f1bb5df5239021fd09ebc2a5e8070e705d36"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1ed959fef5b1c6f1a7a3fbea543698c30ebd6678"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/246cf66e300b76099b5dbd3fdd39e9a5dbc53f02"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7949b0df3dd9f4817ed4a4e989fa9ee81df6205f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cfe5b38c37720313eff0dec5517442c7ab3c9a20"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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