{
  "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-2026-98568",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-98568",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-10-18T15:18:34.562Z",
    "updatedAt": "2026-10-19T09:21:53.865Z",
    "importedAt": "2026-10-24T01:58:41.756Z",
    "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": "vxlan: use one headroom snapshot for neighbour replies",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: use one headroom snapshot for neighbour replies\n\nvxlan_na_create() samples LL_RESERVED_SPACE() to size the reply skb and then\nsamples it again to reserve headroom. A concurrent vxlan_changelink() can\nupdate needed_headroom between the two reads, creating a TOCTOU race. The\nsecond value can exceed the allocation and make the Ethernet header write out\nof bounds.\n\nThe race is reproducible on the unpatched kernel. It occurred when\nvxlan_na_create() generated a neighbour reply while vxlan_changelink() changed\nthe link headroom. KASAN caught a four-byte write two bytes beyond a 704-byte\nskbuff_small_head allocation.\n\nSnapshot the headroom once and use that value for both allocation and\nreservation.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa",
              "status": "affected",
              "versionType": "git",
              "lessThan": "45a67662bf8ce3aa5643accf98d328dfbb47eaf6"
            },
            {
              "version": "4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa",
              "status": "affected",
              "versionType": "git",
              "lessThan": "315d42ca39f69846662961c25dcf2bb07c350d14"
            },
            {
              "version": "4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a3c5eb6e382dd426a5e7eb08608897ed57167ff7"
            },
            {
              "version": "4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ff022fd9d0f0282c575e11778b96bd1b637503eb"
            },
            {
              "version": "4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa",
              "status": "affected",
              "versionType": "git",
              "lessThan": "481506a756dcd828ef42391cb08f38d8d96d38fc"
            },
            {
              "version": "d8be18c52dbc94989f6d74637b731af39cd3d902",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "3927dace523706cc00f808520eaf2125dd7c07b5",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "3.12.18",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "3.13"
            },
            {
              "version": "3.13.10",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "3.14"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.14",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.14"
            },
            {
              "version": "6.6.158",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.112",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.55",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.9",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}