{
  "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-2026-43040",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-43040",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-05-01T14:15:37.364Z",
    "updatedAt": "2026-10-15T01:18:52.082Z",
    "importedAt": "2026-10-24T01:58:08.712Z",
    "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": "net: ipv6: ndisc: fix ndisc_ra_useropt to initialize nduseropt_padX fields to zero to prevent an info-leak",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ipv6: ndisc: fix ndisc_ra_useropt to initialize nduseropt_padX fields to zero to prevent an info-leak\n\nWhen processing Router Advertisements with user options the kernel\nbuilds an RTM_NEWNDUSEROPT netlink message. The nduseroptmsg struct\nhas three padding fields that are never zeroed and can leak kernel data\n\nThe fix is simple, just zeroes the padding fields.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "31910575a9de61e78065e93846e8e7a4894a18bf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1da9023f6b071a38e5430ffbce4b70b2b1ac4f9c"
            },
            {
              "version": "31910575a9de61e78065e93846e8e7a4894a18bf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2fe4d0ba690a69ad6ae9f7ab9bdc96e02610b648"
            },
            {
              "version": "31910575a9de61e78065e93846e8e7a4894a18bf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "11d7fe97421cfc81549940c20ed5ac9472d6db05"
            },
            {
              "version": "31910575a9de61e78065e93846e8e7a4894a18bf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7f56d87e527bb5a13c3e8b0d5840cb6332822f6d"
            },
            {
              "version": "31910575a9de61e78065e93846e8e7a4894a18bf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4f810c686fde509d1cdaa706322d9d2531f8f1a4"
            },
            {
              "version": "31910575a9de61e78065e93846e8e7a4894a18bf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b485eef3d97b7aae55ce669b6de555ec81f3d21c"
            },
            {
              "version": "31910575a9de61e78065e93846e8e7a4894a18bf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ef3645606e4a635d5062a492f22b7f490852ee67"
            },
            {
              "version": "31910575a9de61e78065e93846e8e7a4894a18bf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ae05340ccaa9d347fe85415609e075545bec589f"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.24",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.24"
            },
            {
              "version": "5.10.253",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.203",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.168",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.134",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.81",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.22",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19.12",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.19.*"
            },
            {
              "version": "7.0",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}