ghsa-4whh-7h4c-xh74
Vulnerability from github
Published
2025-09-05 18:31
Modified
2025-09-05 18:31
Details

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

vsock/virtio: Validate length in packet header before skb_put()

When receiving a vsock packet in the guest, only the virtqueue buffer size is validated prior to virtio_vsock_skb_rx_put(). Unfortunately, virtio_vsock_skb_rx_put() uses the length from the packet header as the length argument to skb_put(), potentially resulting in SKB overflow if the host has gone wonky.

Validate the length as advertised by the packet header before calling virtio_vsock_skb_rx_put().

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{
  "affected": [],
  "aliases": [
    "CVE-2025-39718"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-05T18:15:49Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvsock/virtio: Validate length in packet header before skb_put()\n\nWhen receiving a vsock packet in the guest, only the virtqueue buffer\nsize is validated prior to virtio_vsock_skb_rx_put(). Unfortunately,\nvirtio_vsock_skb_rx_put() uses the length from the packet header as the\nlength argument to skb_put(), potentially resulting in SKB overflow if\nthe host has gone wonky.\n\nValidate the length as advertised by the packet header before calling\nvirtio_vsock_skb_rx_put().",
  "id": "GHSA-4whh-7h4c-xh74",
  "modified": "2025-09-05T18:31:27Z",
  "published": "2025-09-05T18:31:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39718"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0dab92484474587b82e8e0455839eaf5ac7bf894"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/676f03760ca1d69c2470cef36c44dc152494b47c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/969b06bd8b7560efb100a34227619e7d318fbe05"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ee438c492b2e0705d819ac0e25d04fae758d8f8f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/faf332a10372390ce65d0b803888f4b25a388335"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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