ghsa-p6f8-9m89-hwvw
Vulnerability from github
Published
2025-01-31 12:33
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:

vsock: prevent null-ptr-deref in vsock_*[has_data|has_space]

Recent reports have shown how we sometimes call vsock_*_has_data() when a vsock socket has been de-assigned from a transport (see attached links), but we shouldn't.

Previous commits should have solved the real problems, but we may have more in the future, so to avoid null-ptr-deref, we can return 0 (no space, no data available) but with a warning.

This way the code should continue to run in a nearly consistent state and have a warning that allows us to debug future problems.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-21666"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-01-31T12:15:27Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvsock: prevent null-ptr-deref in vsock_*[has_data|has_space]\n\nRecent reports have shown how we sometimes call vsock_*_has_data()\nwhen a vsock socket has been de-assigned from a transport (see attached\nlinks), but we shouldn\u0027t.\n\nPrevious commits should have solved the real problems, but we may have\nmore in the future, so to avoid null-ptr-deref, we can return 0\n(no space, no data available) but with a warning.\n\nThis way the code should continue to run in a nearly consistent state\nand have a warning that allows us to debug future problems.",
  "id": "GHSA-p6f8-9m89-hwvw",
  "modified": "2025-11-03T21:32:30Z",
  "published": "2025-01-31T12:33:02Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21666"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/91751e248256efc111e52e15115840c35d85abaf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9e5fed46ccd2c34c5fa5a9c8825ce4823fdc853e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b52e50dd4fabd12944172bd486a4f4853b7f74dd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bc9c49341f9728c31fe248c5fbba32d2e81a092b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c23d1d4f8efefb72258e9cedce29de10d057f8ca"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/daeac89cdb03d30028186f5ff7dc26ec8fa843e7"
    },
    {
      "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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