{
  "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-2026-74684",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-74684",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-08-22T15:32:50.846Z",
    "updatedAt": "2026-10-21T12:46:07.263Z",
    "importedAt": "2026-10-24T01:58:30.346Z",
    "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": "net: tap: set skb->dev before parsing virtio net header in tap_get_user_xdp()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: tap: set skb->dev before parsing virtio net header in tap_get_user_xdp()\n\nThe commit 4f61f133f354 (\"net: tap: NULL pointer derefence in\ndev_parse_header_protocol when skb->dev is null\") fixed a crash in\ntap_get_user() by assigning skb->dev before calling tun_vnet_hdr_to_skb().\nThis is required because virtio_net_hdr_to_skb() may invoke\ndev_parse_header_protocol(), which dereferences skb->dev. Without the\nassignment, a NULL pointer dereference can occur.\n\nHowever, tap_get_user_xdp() still parses the virtio-net header before\nassigning skb->dev. When the vhost TX path passes an XDP buffer containing\na GSO virtio-net header but the protocol is set to zero on purpose,\ntun_vnet_hdr_to_skb() can reach dev_parse_header_protocol() while skb->dev\nis still NULL, resulting in a crash.\n\nFix this by looking up the tap device and assigning skb->dev before calling\ntun_vnet_hdr_to_skb(), matching the ordering already used in\ntap_get_user(). Preserve the existing RCU read-side critical section across\ndev_queue_xmit().",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "924a9bc362a5223cd448ca08c3dde21235adc310",
              "status": "affected",
              "versionType": "git",
              "lessThan": "61dd022c55c7307ec119e5672cb141cccbecf3b1"
            },
            {
              "version": "924a9bc362a5223cd448ca08c3dde21235adc310",
              "status": "affected",
              "versionType": "git",
              "lessThan": "15583b07fd691a844fbf7b3ad612cdc9e9a657c0"
            },
            {
              "version": "924a9bc362a5223cd448ca08c3dde21235adc310",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8b444b126cd8e4473e652f529753ed4dd1360a9c"
            },
            {
              "version": "924a9bc362a5223cd448ca08c3dde21235adc310",
              "status": "affected",
              "versionType": "git",
              "lessThan": "164c31ee252ebd1ac8f44c2dfc5486b6d9a0379b"
            },
            {
              "version": "924a9bc362a5223cd448ca08c3dde21235adc310",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3874892dd27d5387aa9a06f58d9060f18f351d24"
            },
            {
              "version": "ea3fb2ce5fa794d02135f5c079e05cd6fc3f545d",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "54ef8243c3c8e90f1ea5792e6752e021a25c8eb3",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "ca278267d6cd9544645731732455b6b20cb0e895",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "faa3baa2828c5e1c4374f3e60041f75c64f5fcb6",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "99b1d3f74b9ef72c2f74c8e4c078e1bc0706e748",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "4.14.226",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.15"
            },
            {
              "version": "4.19.181",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.20"
            },
            {
              "version": "5.4.106",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.5"
            },
            {
              "version": "5.10.24",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.11"
            },
            {
              "version": "5.11.7",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.12"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.12",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.12"
            },
            {
              "version": "6.6.160",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.105",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.45",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.1.9",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "version": "7.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}