{
  "affected": [
    {
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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            }
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
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      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.178"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.145"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.97"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.40"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.18.0"
            },
            {
              "fixed": "7.1.5"
            }
          ],
          "type": "ECOSYSTEM"
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      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64552.json"
  },
  "details": "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-\u003eprivate\ninto skb_shinfo()-\u003efrags[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.",
  "id": "CVE-2026-64552",
  "modified": "2026-07-29T03:30:28.562387926Z",
  "published": "2026-07-27T20:10:40.570Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/38e94d63e29f4a5c6eae87ee2c02101aaa321502"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9e5ad06ea826322ce8c58b4a68442a96f600c3c4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c7fc9adf4e006155f7f2aeda052fbcde25cdcc49"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e6b8463b7d791f3886d7584259d6e9f06a69f12e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f9451d0fd5ba635dcabb49bfe456a6db734a8986"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fbeb65154583879d556ea94cb2f15888e9470f3d"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64552.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64552"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "virtio-net: fix len check in receive_big()"
}