{
  "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-2025-40218",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-40218",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-12-04T14:50:41.873Z",
    "updatedAt": "2026-05-11T21:45:03.319Z",
    "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": "mm/damon/vaddr: do not repeat pte_offset_map_lock() until success",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/vaddr: do not repeat pte_offset_map_lock() until success\n\nDAMON's virtual address space operation set implementation (vaddr) calls\npte_offset_map_lock() inside the page table walk callback function.  This\nis for reading and writing page table accessed bits.  If\npte_offset_map_lock() fails, it retries by returning the page table walk\ncallback function with ACTION_AGAIN.\n\npte_offset_map_lock() can continuously fail if the target is a pmd\nmigration entry, though.  Hence it could cause an infinite page table walk\nif the migration cannot be done until the page table walk is finished. \nThis indeed caused a soft lockup when CPU hotplugging and DAMON were\nrunning in parallel.\n\nAvoid the infinite loop by simply not retrying the page table walk.  DAMON\nis promising only a best-effort accuracy, so missing access to such pages\nis no problem.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "7780d04046a2288ab85d88bedacc60fa4fad9971",
              "status": "affected",
              "versionType": "git",
              "lessThan": "677ebfe5d00f94adec0c0204f6e6e2a82d3f77bf"
            },
            {
              "version": "7780d04046a2288ab85d88bedacc60fa4fad9971",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ac42320ec873bfe726141069cfdd90ee5bc4e885"
            },
            {
              "version": "7780d04046a2288ab85d88bedacc60fa4fad9971",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0ccd91cf749536d41307a07e60ec14ab0dbf21f5"
            },
            {
              "version": "7780d04046a2288ab85d88bedacc60fa4fad9971",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b93af2cc8e036754c0d9970d9ddc47f43cc94b9f"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.5",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.5"
            },
            {
              "version": "6.6.113",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.54",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.17.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.17.*"
            },
            {
              "version": "6.18",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}