ghsa-28mc-jvx2-g85v
Vulnerability from github
Published
2025-02-10 18:30
Modified
2025-02-10 18:30
Details

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

io_uring/rsrc: require cloned buffers to share accounting contexts

When IORING_REGISTER_CLONE_BUFFERS is used to clone buffers from uring instance A to uring instance B, where A and B use different MMs for accounting, the accounting can go wrong: If uring instance A is closed before uring instance B, the pinned memory counters for uring instance B will be decremented, even though the pinned memory was originally accounted through uring instance A; so the MM of uring instance B can end up with negative locked memory.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-21686"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-10T16:15:38Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/rsrc: require cloned buffers to share accounting contexts\n\nWhen IORING_REGISTER_CLONE_BUFFERS is used to clone buffers from uring\ninstance A to uring instance B, where A and B use different MMs for\naccounting, the accounting can go wrong:\nIf uring instance A is closed before uring instance B, the pinned memory\ncounters for uring instance B will be decremented, even though the pinned\nmemory was originally accounted through uring instance A; so the MM of\nuring instance B can end up with negative locked memory.",
  "id": "GHSA-28mc-jvx2-g85v",
  "modified": "2025-02-10T18:30:47Z",
  "published": "2025-02-10T18:30:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21686"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/19d340a2988d4f3e673cded9dde405d727d7e248"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cafc60ae35f82ebf156b3245f979ca61cbb8e42c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/efd96fbe23fa87de39116f632401f67b93be21ab"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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