{
  "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-2025-39909",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-39909",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-10-01T07:44:32.936Z",
    "updatedAt": "2026-05-11T21:38:45.192Z",
    "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/lru_sort: avoid divide-by-zero in damon_lru_sort_apply_parameters()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/lru_sort: avoid divide-by-zero in damon_lru_sort_apply_parameters()\n\nPatch series \"mm/damon: avoid divide-by-zero in DAMON module's parameters\napplication\".\n\nDAMON's RECLAIM and LRU_SORT modules perform no validation on\nuser-configured parameters during application, which may lead to\ndivision-by-zero errors.\n\nAvoid the divide-by-zero by adding validation checks when DAMON modules\nattempt to apply the parameters.\n\n\nThis patch (of 2):\n\nDuring the calculation of 'hot_thres' and 'cold_thres', either\n'sample_interval' or 'aggr_interval' is used as the divisor, which may\nlead to division-by-zero errors.  Fix it by directly returning -EINVAL\nwhen such a case occurs.  Additionally, since 'aggr_interval' is already\nrequired to be set no smaller than 'sample_interval' in damon_set_attrs(),\nonly the case where 'sample_interval' is zero needs to be checked.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "40e983cca9274e177bd5b9379299b44d9536ac68",
              "status": "affected",
              "versionType": "git",
              "lessThan": "74e391f7da7d9d5235a3cca88ee9fc18f720c75b"
            },
            {
              "version": "40e983cca9274e177bd5b9379299b44d9536ac68",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7bb675c9f0257840d33e5d1337d7e3afdd74a6bf"
            },
            {
              "version": "40e983cca9274e177bd5b9379299b44d9536ac68",
              "status": "affected",
              "versionType": "git",
              "lessThan": "af0ae62b935317bed1a1361c8c9579db9d300e70"
            },
            {
              "version": "40e983cca9274e177bd5b9379299b44d9536ac68",
              "status": "affected",
              "versionType": "git",
              "lessThan": "326a4b3750c71af3f3c52399ec4dbe33b6da4c26"
            },
            {
              "version": "40e983cca9274e177bd5b9379299b44d9536ac68",
              "status": "affected",
              "versionType": "git",
              "lessThan": "711f19dfd783ffb37ca4324388b9c4cb87e71363"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.0",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.0"
            },
            {
              "version": "6.1.153",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.107",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.48",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.16.8",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.16.*"
            },
            {
              "version": "6.17",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}