{
  "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-2026-90209",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-90209",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-17T16:07:24.126Z",
    "updatedAt": "2026-10-19T08:59:45.470Z",
    "importedAt": "2026-10-24T01:58:35.090Z",
    "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": "s390/debug: Fix deadlock during unregister",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/debug: Fix deadlock during unregister\n\nUnregistering an s390dbf debug area while one of the associated debugfs\nfiles is being written to can cause a deadlock:\n\n$ echo >.../vmur/level    $ rmmod vmur\n===================================================\ndebugfs write\ndebugfs_file_get()\n                          debug_unregister()\n                          mutex_lock(debug_mutex)\n                          debugfs_remove()\n                          wait for debugfs_file_put()\ndebug_file_ops.write()\ndebug_input()\nmutex_lock(debug_mutex) ==> DEADLOCK\n\nFix this by splitting debug_unregister() into an s390dbf and debugfs\npart, and running only the s390dbf part with debug_mutex locked.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "9372a82892c2caa6bccab9a4081166fa769699f8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a214c3dacc779b2afcb0ac9c8001e45ee4ffb2ed"
            },
            {
              "version": "9372a82892c2caa6bccab9a4081166fa769699f8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "183f8f6d64bb0510070c856b9927618c53014a7b"
            },
            {
              "version": "9372a82892c2caa6bccab9a4081166fa769699f8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a08b70ed2d1ec907353a72f15163b8e34ff4b2f8"
            },
            {
              "version": "9372a82892c2caa6bccab9a4081166fa769699f8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "45bb341d1b73eb293e0dd43d9b72bbc8b615d0ba"
            },
            {
              "version": "9372a82892c2caa6bccab9a4081166fa769699f8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5d83f3faa3fb7f23f298cfd40382611999de5d1d"
            },
            {
              "version": "9372a82892c2caa6bccab9a4081166fa769699f8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "54e1259b75d6402a1d0cfb822b9bb2c507e53dab"
            },
            {
              "version": "9372a82892c2caa6bccab9a4081166fa769699f8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "445c31ac638fd1af203d79bdf25fc0cb3149fbbc"
            },
            {
              "version": "c68ba4a708fbd0efdc384cd29250bb292a45e559",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "86f9980909f31ab205323eeeb290fe3cbb4952b4",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "fe5793e90d3f572a87ba67fe2f0e1679fdff14f8",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "e234f66168f0d50c0d28154fb983a14e85c3c526",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.4.146",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.5"
            },
            {
              "version": "5.10.65",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.11"
            },
            {
              "version": "5.13.17",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.14"
            },
            {
              "version": "5.14.4",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.15"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.15",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.15"
            },
            {
              "version": "5.15.221",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.188",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.157",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.110",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.52",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.6",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}