{
  "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-2026-64552",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-64552",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-27T20:10:40.570Z",
    "updatedAt": "2026-10-19T20:48:40.599Z",
    "importedAt": "2026-10-24T01:58:25.636Z",
    "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": "virtio-net: fix len check in receive_big()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio-net: fix len check in receive_big()\n\nreceive_big() bounds the device-announced length by\n(big_packets_num_skbfrags + 1) * PAGE_SIZE.  That is still too loose:\nadd_recvbuf_big() sets sg[1] to start at offset\nsizeof(struct padded_vnet_hdr) into the first page, so the chain\nactually carries hdr_len + (PAGE_SIZE - sizeof(padded_vnet_hdr)) +\nbig_packets_num_skbfrags * PAGE_SIZE bytes -- 20 bytes less than the\ncheck allows for the common hdr_len == 12 case.\n\nA malicious virtio backend can announce a len in that gap.  page_to_skb()\nthen walks one frag past the page chain, storing a NULL page->private\ninto skb_shinfo()->frags[MAX_SKB_FRAGS], which is both an out-of-bounds\nwrite past the static frag array and a NULL frag handed up the rx path.\n\nBound len by the size add_recvbuf_big() actually advertised.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "82f9028e83944a9eee5229cbc6fee9be1de8a62d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f9451d0fd5ba635dcabb49bfe456a6db734a8986"
            },
            {
              "version": "946dec89c41726b94d31147ec528b96af0be1b5a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "38e94d63e29f4a5c6eae87ee2c02101aaa321502"
            },
            {
              "version": "82fe78065450d2d07f36a22e2b6b44955cf5ca5b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "fbeb65154583879d556ea94cb2f15888e9470f3d"
            },
            {
              "version": "0c716703965ffc5ef4311b65cb5d84a703784717",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c7fc9adf4e006155f7f2aeda052fbcde25cdcc49"
            },
            {
              "version": "0c716703965ffc5ef4311b65cb5d84a703784717",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e6b8463b7d791f3886d7584259d6e9f06a69f12e"
            },
            {
              "version": "0c716703965ffc5ef4311b65cb5d84a703784717",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9e5ad06ea826322ce8c58b4a68442a96f600c3c4"
            },
            {
              "version": "3e9d89f2ecd3636bd4cbdfd0b2dfdaf58f9882e2",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "6.1.159",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.1.178"
            },
            {
              "version": "6.6.117",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.6.145"
            },
            {
              "version": "6.12.58",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.12.97"
            },
            {
              "version": "6.17.8",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.18"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.18",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.18"
            },
            {
              "version": "6.1.178",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.145",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.97",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.40",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.1.5",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "version": "7.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}