{
  "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-2025-40231",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-40231",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-12-04T15:31:22.199Z",
    "updatedAt": "2026-05-23T16:01:44.908Z",
    "importedAt": "2026-10-24T01:57:34.152Z",
    "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: fix lock inversion in vsock_assign_transport()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nvsock: fix lock inversion in vsock_assign_transport()\n\nSyzbot reported a potential lock inversion deadlock between\nvsock_register_mutex and sk_lock-AF_VSOCK when vsock_linger() is called.\n\nThe issue was introduced by commit 687aa0c5581b (\"vsock: Fix\ntransport_* TOCTOU\") which added vsock_register_mutex locking in\nvsock_assign_transport() around the transport->release() call, that can\ncall vsock_linger(). vsock_assign_transport() can be called with sk_lock\nheld. vsock_linger() calls sk_wait_event() that temporarily releases and\nre-acquires sk_lock. During this window, if another thread hold\nvsock_register_mutex while trying to acquire sk_lock, a circular\ndependency is created.\n\nFix this by releasing vsock_register_mutex before calling\ntransport->release() and vsock_deassign_transport(). This is safe\nbecause we don't need to hold vsock_register_mutex while releasing the\nold transport, and we ensure the new transport won't disappear by\nobtaining a module reference first via try_module_get().",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "8667e8d0eb46bc54fdae30ba2f4786407d3d88eb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ce4f856c64f0bc30e29302a0ce41f4295ca391c5"
            },
            {
              "version": "36a439049b34cca0b3661276049b84a1f76cc21a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "09bba278ccde25a14b6e5088a9e65a8717d0cccf"
            },
            {
              "version": "9ce53e744f18e73059d3124070e960f3aa9902bf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b44182c116778feaa05da52a426aeb9da1878dcf"
            },
            {
              "version": "9d24bb6780282b0255b9929abe5e8f98007e2c6e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "42ed0784d11adebf748711e503af0eb9f1e6d81d"
            },
            {
              "version": "ae2c712ba39c7007de63cb0c75b51ce1caaf1da5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "251caee792a21eb0b781aab91362b422c945e162"
            },
            {
              "version": "687aa0c5581b8d4aa87fd92973e4ee576b550cdf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a2a4346eea8b4cb75037dbcb20b98cb454324f80"
            },
            {
              "version": "687aa0c5581b8d4aa87fd92973e4ee576b550cdf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f7c877e7535260cc7a21484c994e8ce7e8cb6780"
            },
            {
              "version": "7b73bddf54777fb62d4d8c7729d0affe6df04477",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.10.240",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.10.246"
            },
            {
              "version": "5.15.189",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.15.196"
            },
            {
              "version": "6.1.146",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.1.158"
            },
            {
              "version": "6.6.99",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.6.115"
            },
            {
              "version": "6.12.39",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.12.56"
            },
            {
              "version": "6.15.7",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.16"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.16",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.16"
            },
            {
              "version": "5.10.246",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.196",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.158",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.115",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.56",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.17.6",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.17.*"
            },
            {
              "version": "6.18",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}