{
  "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-2025-40279",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-40279",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-12-06T21:51:03.010Z",
    "updatedAt": "2026-05-11T21:46:16.602Z",
    "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": "net: sched: act_connmark: initialize struct tc_ife to fix kernel leak",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sched: act_connmark: initialize struct tc_ife to fix kernel leak\n\nIn tcf_connmark_dump(), the variable 'opt' was partially initialized using a\ndesignatied initializer. While the padding bytes are reamined\nuninitialized. nla_put() copies the entire structure into a\nnetlink message, these uninitialized bytes leaked to userspace.\n\nInitialize the structure with memset before assigning its fields\nto ensure all members and padding are cleared prior to beign copied.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae",
              "status": "affected",
              "versionType": "git",
              "lessThan": "218b67c8c8246d47a2a7910eae80abe4861fe2b7"
            },
            {
              "version": "22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae",
              "status": "affected",
              "versionType": "git",
              "lessThan": "73cc56c608c209d3d666cc571293b090a471da70"
            },
            {
              "version": "22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae",
              "status": "affected",
              "versionType": "git",
              "lessThan": "31e4aa93e2e5b5647fc235b0f6ee329646878f9e"
            },
            {
              "version": "22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae",
              "status": "affected",
              "versionType": "git",
              "lessThan": "51cb05d4fd632596816ba44e882e84db9fb28a7e"
            },
            {
              "version": "22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae",
              "status": "affected",
              "versionType": "git",
              "lessThan": "25837889ec062f2b7618142cd80253dff3da5343"
            },
            {
              "version": "22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae",
              "status": "affected",
              "versionType": "git",
              "lessThan": "62b656e43eaeae445a39cd8021a4f47065af4389"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.0",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.0"
            },
            {
              "version": "5.15.197",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.159",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.117",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.59",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.17.9",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.17.*"
            },
            {
              "version": "6.18",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}