ghsa-qmw3-6h2f-2gvh
Vulnerability from github
Published
2025-08-16 12:30
Modified
2025-08-16 12:30
Details

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

net: libwx: fix the using of Rx buffer DMA

The wx_rx_buffer structure contained two DMA address fields: 'dma' and 'page_dma'. However, only 'page_dma' was actually initialized and used to program the Rx descriptor. But 'dma' was uninitialized and used in some paths.

This could lead to undefined behavior, including DMA errors or use-after-free, if the uninitialized 'dma' was used. Althrough such error has not yet occurred, it is worth fixing in the code.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-38533"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-08-16T12:15:28Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: libwx: fix the using of Rx buffer DMA\n\nThe wx_rx_buffer structure contained two DMA address fields: \u0027dma\u0027 and\n\u0027page_dma\u0027. However, only \u0027page_dma\u0027 was actually initialized and used\nto program the Rx descriptor. But \u0027dma\u0027 was uninitialized and used in\nsome paths.\n\nThis could lead to undefined behavior, including DMA errors or\nuse-after-free, if the uninitialized \u0027dma\u0027 was used. Althrough such\nerror has not yet occurred, it is worth fixing in the code.",
  "id": "GHSA-qmw3-6h2f-2gvh",
  "modified": "2025-08-16T12:30:32Z",
  "published": "2025-08-16T12:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38533"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/027701180a7bcb64c42eab291133ef0c87b5b6c5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/05c37b574997892a40a0e9b9b88a481566b2367d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5fd77cc6bd9b368431a815a780e407b7781bcca0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ba7c793f96c1c2b944bb6f423d7243f3afc30fe9"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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