{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-21904",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-21904"
  ],
  "published": "2025-04-01T15:40:16Z",
  "summary": "caif_virtio: fix wrong pointer check in cfv_probe()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncaif_virtio: fix wrong pointer check in cfv_probe()\n\ndel_vqs() frees virtqueues, therefore cfv->vq_tx pointer should be checked\nfor NULL before calling it, not cfv->vdev. Also the current implementation\nis redundant because the pointer cfv->vdev is dereferenced before it is\nchecked for NULL.\n\nFix this by checking cfv->vq_tx for NULL instead of cfv->vdev before\ncalling del_vqs().",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.131",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-21904"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/990fff6980d0c1693d60a812f58dbf93eab0473f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7b5fe58959822e6cfa884327cabba6be3b01883d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8e4e08ca4cc634b337bb74bc9a70758fdeda0bcb"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/29e0cd296c87240278e2f7ea4cf3f496b60c03af"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/90d302619ee7ce5ed0c69c29c290bdccfde66418"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/56cddf71cce3b15b078e937fadab29962b6f6643"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/597c27e5f04cb50e56cc9aeda75d3e42b6b89c3e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a466fd7e9fafd975949e5945e2f70c33a94b1a70"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}