{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2025-21666",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-21666",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-01-31T11:25:31.138Z",
    "updatedAt": "2026-10-15T01:02:53.911Z",
    "importedAt": "2026-10-24T01:57:29.455Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "vsock: prevent null-ptr-deref in vsock_*[has_data|has_space]",
      "summary": "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't.\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.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "daeac89cdb03d30028186f5ff7dc26ec8fa843e7"
            },
            {
              "version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9e5fed46ccd2c34c5fa5a9c8825ce4823fdc853e"
            },
            {
              "version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b52e50dd4fabd12944172bd486a4f4853b7f74dd"
            },
            {
              "version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "bc9c49341f9728c31fe248c5fbba32d2e81a092b"
            },
            {
              "version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c23d1d4f8efefb72258e9cedce29de10d057f8ca"
            },
            {
              "version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "91751e248256efc111e52e15115840c35d85abaf"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.5",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.5"
            },
            {
              "version": "5.10.234",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.177",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.127",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.74",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.11",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.13",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}