{
  "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-2026-31509",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-31509",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-04-22T13:54:27.436Z",
    "updatedAt": "2026-05-11T22:10:10.109Z",
    "importedAt": "2026-10-24T01:58:02.025Z",
    "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": "nfc: nci: fix circular locking dependency in nci_close_device",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: nci: fix circular locking dependency in nci_close_device\n\nnci_close_device() flushes rx_wq and tx_wq while holding req_lock.\nThis causes a circular locking dependency because nci_rx_work()\nrunning on rx_wq can end up taking req_lock too:\n\n  nci_rx_work -> nci_rx_data_packet -> nci_data_exchange_complete\n    -> __sk_destruct -> rawsock_destruct -> nfc_deactivate_target\n    -> nci_deactivate_target -> nci_request -> mutex_lock(&ndev->req_lock)\n\nMove the flush of rx_wq after req_lock has been released.\nThis should safe (I think) because NCI_UP has already been cleared\nand the transport is closed, so the work will see it and return\n-ENETDOWN.\n\nNIPA has been hitting this running the nci selftest with a debug\nkernel on roughly 4% of the runs.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "6a2968aaf50c7a22fced77a5e24aa636281efca8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7ed00a3edc8597fe2333f524401e2889aa1b5edf"
            },
            {
              "version": "6a2968aaf50c7a22fced77a5e24aa636281efca8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5eef9ebec7f5738f12cadede3545c05b34bf5ac3"
            },
            {
              "version": "6a2968aaf50c7a22fced77a5e24aa636281efca8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ca54e904a071aa65ef3ad46ba42d51aaac6b73b4"
            },
            {
              "version": "6a2968aaf50c7a22fced77a5e24aa636281efca8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "eb435d150ca74b4d40f77f1a2266f3636ed64a79"
            },
            {
              "version": "6a2968aaf50c7a22fced77a5e24aa636281efca8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1edc12d2bbcb7a8d0f1088e6fccb9d8c01bb1289"
            },
            {
              "version": "6a2968aaf50c7a22fced77a5e24aa636281efca8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d89b74bf08f067b55c03d7f999ba0a0e73177eb3"
            },
            {
              "version": "6a2968aaf50c7a22fced77a5e24aa636281efca8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "09143c0e8f3b03517e6233aad42f45c794d8df8e"
            },
            {
              "version": "6a2968aaf50c7a22fced77a5e24aa636281efca8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4527025d440ce84bf56e75ce1df2e84cb8178616"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.2",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.2"
            },
            {
              "version": "5.10.253",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.203",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.168",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.131",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.80",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.21",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19.11",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.19.*"
            },
            {
              "version": "7.0",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}