{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-38512",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-38512"
  ],
  "published": "2025-08-16T10:58:18Z",
  "summary": "wifi: prevent A-MSDU attacks in mesh networks",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: prevent A-MSDU attacks in mesh networks\n\nThis patch is a mitigation to prevent the A-MSDU spoofing vulnerability\nfor mesh networks. The initial update to the IEEE 802.11 standard, in\nresponse to the FragAttacks, missed this case (CVE-2025-27558). It can\nbe considered a variant of CVE-2020-24588 but for mesh networks.\n\nThis patch tries to detect if a standard MSDU was turned into an A-MSDU\nby an adversary. This is done by parsing a received A-MSDU as a standard\nMSDU, calculating the length of the Mesh Control header, and seeing if\nthe 6 bytes after this header equal the start of an rfc1042 header. If\nequal, this is a strong indication of an ongoing attack attempt.\n\nThis defense was tested with mac80211_hwsim against a mesh network that\nuses an empty Mesh Address Extension field, i.e., when four addresses\nare used, and when using a 12-byte Mesh Address Extension field, i.e.,\nwhen six addresses are used. Functionality of normal MSDUs and A-MSDUs\nwas also tested, and confirmed working, when using both an empty and\n12-byte Mesh Address Extension field.\n\nIt was also tested with mac80211_hwsim that A-MSDU attacks in non-mesh\nnetworks keep being detected and prevented.\n\nNote that the vulnerability being patched, and the defense being\nimplemented, was also discussed in the following paper and in the\nfollowing IEEE 802.11 presentation:\n\nhttps://papers.mathyvanhoef.com/wisec2025.pdf\nhttps://mentor.ieee.org/802.11/dcn/25/11-25-0949-00-000m-a-msdu-mesh-spoof-protection.docx",
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-38512"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e2c8a3c0388aef6bfc4aabfba07bc7dff16eea80"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ec6392061de6681148b63ee6c8744da833498cdd"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e01851f6e9a665a6011b14714b271d3e6b0b8d32"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6e3b09402cc6c3e3474fa548e8adf6897dda05de"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/737bb912ebbe4571195c56eba557c4d7315b26fb"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T12:19:11Z"
  }
}