{
  "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-2026-89559",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-89559",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-11T19:44:31.337Z",
    "updatedAt": "2026-10-19T08:48:52.683Z",
    "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": "libnvdimm/labels: Prevent integer overflow in __nd_label_validate()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibnvdimm/labels: Prevent integer overflow in __nd_label_validate()\n\nThe on-media namespace index field nslot is a u32 read from the DIMM\nlabel storage area.  __nd_label_validate() bounds it against the config\narea size, but sizeof_namespace_label() returns unsigned, so the product\nnslot * label_size is evaluated in 32-bit and wraps modulo 2^32 before\nthe comparison.  A crafted nslot passes the bound and is then used as the\nloop trip count in nd_label_data_init(), whose memset() walks off the end\nof the config_size buffer: an out-of-bounds write.\n\nThe field is not trusted -- it comes from the medium, or from userspace\nvia ND_CMD_SET_CONFIG_DATA.  Evaluate the product in 64-bit so the bound\ncheck is exact; conforming labels are unaffected.\n\nThe check was safe when introduced by commit 4a826c83db4e (\"libnvdimm:\nnamespace indices: read and validate\"): it multiplied by sizeof(struct\nnd_namespace_label), a size_t, so on a 64-bit build the product did not\nwrap.  Commit 564e871aa66f (\"libnvdimm, label: add v1.2 nvdimm label\ndefinitions\") narrowed it to 32 bits when the label size became a runtime\nvalue read via sizeof_namespace_label().",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "564e871aa66f548a947b23808d3140f326381f0c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b4975f2ff6c82adc24ae547f029f82530ba43cfe"
            },
            {
              "version": "564e871aa66f548a947b23808d3140f326381f0c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6030597ec683d1e5b46445f888bb5c7776b5a0c4"
            },
            {
              "version": "564e871aa66f548a947b23808d3140f326381f0c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1c391696d2791f82ae462e11da9a0d96f90b240c"
            },
            {
              "version": "564e871aa66f548a947b23808d3140f326381f0c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "93967bfb17dab66642c57e609c99e1a91fe11278"
            },
            {
              "version": "564e871aa66f548a947b23808d3140f326381f0c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e057efcc9c71d90099d9ee00bed0748d0e9fd586"
            },
            {
              "version": "564e871aa66f548a947b23808d3140f326381f0c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "09e649117c54b7e1c004f22eaa19efbadd9ac856"
            },
            {
              "version": "564e871aa66f548a947b23808d3140f326381f0c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "69a734359639fca16a0dd73ab17a34943e76c68b"
            },
            {
              "version": "564e871aa66f548a947b23808d3140f326381f0c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "037770686126155eafc44501312989e2837b9659"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.13",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.13"
            },
            {
              "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": "6.12.109",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.50",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}