{
  "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-2026-46321",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-46321",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-06-09T12:11:13.872Z",
    "updatedAt": "2026-10-15T01:21:35.519Z",
    "importedAt": "2026-10-24T01:58:14.884Z",
    "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": "tun: free page on short-frame rejection in tun_xdp_one()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ntun: free page on short-frame rejection in tun_xdp_one()\n\ntun_xdp_one() returns -EINVAL on a frame shorter than ETH_HLEN without\nfreeing the page that vhost_net_build_xdp() allocated for it.\ntun_sendmsg() discards that -EINVAL and still returns total_len, so\nvhost_tx_batch() takes the success path and never frees the page; each\nshort frame in a batch leaks one page-frag chunk.\n\nA local process that can open /dev/net/tun and /dev/vhost-net can hit\nthis path: it attaches a tun/tap device as the vhost-net backend and\nfeeds TX descriptors whose length minus the virtio-net header is below\nETH_HLEN. Each kick leaks the page-frag chunks for that batch, and a\ntight submission loop exhausts host memory and triggers an OOM panic.\nFree the page before returning -EINVAL, matching the XDP-program error\npath in the same function.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "6100e0237204890269e3f934acfc50d35fd6f319",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0a6f46a9332ad6958992d64d3b3a81a80b2ca940"
            },
            {
              "version": "589382f50b4a5d90d16d8bc9dcbc0e927a3e39b2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0e8211fcf9426f5adddf32516ba0f400ceb9544d"
            },
            {
              "version": "ad6b3f622ccfb4bfedfa53b6ebd91c3d1d04f146",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e915445942af6dcea628bf66d6241641201a0c41"
            },
            {
              "version": "d5ad89b7d01ed4e66fd04734fc63d6e78536692a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5b34f9e4fe2f203724a6e893d6df0316b9670057"
            },
            {
              "version": "049584807f1d797fc3078b68035450a9769eb5c3",
              "status": "affected",
              "versionType": "git",
              "lessThan": "69863ff2720a0e9871f1a5710f2a33a94217fee0"
            },
            {
              "version": "049584807f1d797fc3078b68035450a9769eb5c3",
              "status": "affected",
              "versionType": "git",
              "lessThan": "37a1c268c2c8090bf4dc552d732bd23ba36f8eb0"
            },
            {
              "version": "049584807f1d797fc3078b68035450a9769eb5c3",
              "status": "affected",
              "versionType": "git",
              "lessThan": "98c67be9eb9de72465a071949e84a3cdb8fab5a3"
            },
            {
              "version": "049584807f1d797fc3078b68035450a9769eb5c3",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f4feb1e20058e407cb00f45aff47f5b7e19a6bbf"
            },
            {
              "version": "32b0aaba5dbc85816898167d9b5d45a22eae82e9",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "a9d1c27e2ee3b0ea5d40c105d6e728fc114470bb",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "8418f55302fa1d2eeb73e16e345167e545c598a5",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.10.223",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.10.259"
            },
            {
              "version": "5.15.164",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.15.210"
            },
            {
              "version": "6.1.102",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.1.176"
            },
            {
              "version": "6.6.43",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.6.143"
            },
            {
              "version": "5.4.281",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.5"
            },
            {
              "version": "6.9.12",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.10"
            },
            {
              "version": "6.10.2",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.11"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.11",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.11"
            },
            {
              "version": "5.10.259",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.210",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.176",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.143",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.93",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.35",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.12",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}