ghsa-2398-v7wm-x7gr
Vulnerability from github
Published
2024-12-29 12:30
Modified
2025-11-03 21:32
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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

nvme-pci: fix freeing of the HMB descriptor table

The HMB descriptor table is sized to the maximum number of descriptors that could be used for a given device, but __nvme_alloc_host_mem could break out of the loop earlier on memory allocation failure and end up using less descriptors than planned for, which leads to an incorrect size passed to dma_free_coherent.

In practice this was not showing up because the number of descriptors tends to be low and the dma coherent allocator always allocates and frees at least a page.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-56756"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-12-29T12:15:09Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-pci: fix freeing of the HMB descriptor table\n\nThe HMB descriptor table is sized to the maximum number of descriptors\nthat could be used for a given device, but __nvme_alloc_host_mem could\nbreak out of the loop earlier on memory allocation failure and end up\nusing less descriptors than planned for, which leads to an incorrect\nsize passed to dma_free_coherent.\n\nIn practice this was not showing up because the number of descriptors\ntends to be low and the dma coherent allocator always allocates and\nfrees at least a page.",
  "id": "GHSA-2398-v7wm-x7gr",
  "modified": "2025-11-03T21:32:02Z",
  "published": "2024-12-29T12:30:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-56756"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3c2fb1ca8086eb139b2a551358137525ae8e0d7a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/452f9ddd12bebc04cef741e8ba3806bf0e1fd015"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/582d9ed999b004fb1d415ecbfa86d4d8df455269"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6d0f599db73b099aa724a12736369c4d4d92849d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/869cf50b9c9d1059f5223f79ef68fc0bc6210095"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ac22240540e0c5230d8c4138e3778420b712716a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cee3bff51a35cab1c5d842d409a7b11caefe2386"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fb96d5cfa97a7363245b3dd523f475b04296d87b"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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