{
  "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-2025-40240",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-40240",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-12-04T15:31:29.715Z",
    "updatedAt": "2026-08-05T12:08:44.117Z",
    "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": "sctp: avoid NULL dereference when chunk data buffer is missing",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: avoid NULL dereference when chunk data buffer is missing\n\nchunk->skb pointer is dereferenced in the if-block where it's supposed\nto be NULL only.\n\nchunk->skb can only be NULL if chunk->head_skb is not. Check for frag_list\ninstead and do it just before replacing chunk->skb. We're sure that\notherwise chunk->skb is non-NULL because of outer if() condition.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "90017accff61ae89283ad9a51f9ac46ca01633fb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "61cda2777b07d27459f5cac5a047c3edf9c8a1a9"
            },
            {
              "version": "90017accff61ae89283ad9a51f9ac46ca01633fb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "08165c296597075763130919f2aae59b5822f016"
            },
            {
              "version": "90017accff61ae89283ad9a51f9ac46ca01633fb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "03e80a4b04ef1fb2c61dd63216ab8d3a5dcb196f"
            },
            {
              "version": "90017accff61ae89283ad9a51f9ac46ca01633fb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4f6da435fb5d8a21cbf8cae5ca5a2ba0e1012b71"
            },
            {
              "version": "90017accff61ae89283ad9a51f9ac46ca01633fb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "cb9055ba30306ede4ad920002233d0659982f1cb"
            },
            {
              "version": "90017accff61ae89283ad9a51f9ac46ca01633fb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7a832b0f99be19df608cb75c023f8027b1789bd1"
            },
            {
              "version": "90017accff61ae89283ad9a51f9ac46ca01633fb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "89b465b54227c245ddc7cc9ed822231af21123ef"
            },
            {
              "version": "90017accff61ae89283ad9a51f9ac46ca01633fb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "441f0647f7673e0e64d4910ef61a5fb8f16bfb82"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.8",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.8"
            },
            {
              "version": "5.4.301",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.246",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.196",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.158",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.115",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.56",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.17.6",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.17.*"
            },
            {
              "version": "6.18",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}