{
  "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-2026-90391",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-90391",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-17T16:09:25.083Z",
    "updatedAt": "2026-10-19T09:02:55.602Z",
    "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": "lib/test_hmm: fail dmirror_fault() when the mirrored mm is gone",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nlib/test_hmm: fail dmirror_fault() when the mirrored mm is gone\n\ndmirror_fault() is called from the dmirror_read() and dmirror_write()\nretry loops after dmirror_do_read() or dmirror_do_write() finds a missing\ndevice page table entry.\n\nIf the mirrored mm has already exited, mmget_not_zero() fails.  The\ncurrent code returns 0 in that case, which tells the caller that faulting\nsucceeded even though no page was faulted and no device page table entry\nwas installed.  The caller then retries the same address, hits -ENOENT\nagain, and can loop forever without making progress.\n\nReturn -EFAULT instead, so the ioctl fails when the mirrored mm is no\nlonger faultable.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "b2ef9f5a5cb37643ca5def3516c546457074b882",
              "status": "affected",
              "versionType": "git",
              "lessThan": "50606ced303782f8715e2d0b98ca374ea498fa29"
            },
            {
              "version": "b2ef9f5a5cb37643ca5def3516c546457074b882",
              "status": "affected",
              "versionType": "git",
              "lessThan": "541a67f21ab807c8dbc0ea88d5a2eb73b2618090"
            },
            {
              "version": "b2ef9f5a5cb37643ca5def3516c546457074b882",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d8e64ffab01e032ae29159d27230ace8cf8bdc80"
            },
            {
              "version": "b2ef9f5a5cb37643ca5def3516c546457074b882",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2636569ea7c19d9a40db4a1e8d0a027bdacf1569"
            },
            {
              "version": "b2ef9f5a5cb37643ca5def3516c546457074b882",
              "status": "affected",
              "versionType": "git",
              "lessThan": "701347e31aa607f3782403151a3125729d685275"
            },
            {
              "version": "b2ef9f5a5cb37643ca5def3516c546457074b882",
              "status": "affected",
              "versionType": "git",
              "lessThan": "af7a6d6ec36a16a583ba2e4e9984c3cf1fe34655"
            },
            {
              "version": "b2ef9f5a5cb37643ca5def3516c546457074b882",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a2074f86fc9653831e4fb7b711bb715db330f182"
            },
            {
              "version": "b2ef9f5a5cb37643ca5def3516c546457074b882",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6a8024511ddf4877435c34fb3d6028aa8e590649"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.8",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.8"
            },
            {
              "version": "5.10.270",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "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": "*"
            }
          ]
        }
      ]
    }
  }
}