{
  "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-2026-74668",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-74668",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-08-22T15:32:39.583Z",
    "updatedAt": "2026-10-16T19:16:08.423Z",
    "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": "packet: use consistent hard_header_len in TX_RING send path",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\npacket: use consistent hard_header_len in TX_RING send path\n\ntpacket_snd() reads dev->hard_header_len independently for skb\nallocation and header construction in tpacket_fill_skb(). Concurrent\nnetdevice reconfiguration can therefore make the reserved headroom\nsmaller than the amount later pushed, or make copylen - hard_header_len\nnegative.\n\nSnapshot hard_header_len once before processing ring frames and use it\nfor the frame limit, headroom allocation, copy length, and skb\nconstruction. Pass the snapshot to tpacket_fill_skb().\n\nThe separate SOCK_DGRAM consistency problem between hard_header_len and\nheader_ops->create is not addressed here.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9c7e8ff48c377bef18c3d178748aea0575b69ede"
            },
            {
              "version": "69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2a73b2c37ee3060a880b53cd24783d93fc7be5f8"
            },
            {
              "version": "69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e79f59a8527a49078cfaf8fe8fb5fcefc20c76d2"
            },
            {
              "version": "69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d85d2fd54e901637c81d847811e03c662aee13cd"
            },
            {
              "version": "69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "016763e829cac37b3234eace86fd0a4c560de4a7"
            },
            {
              "version": "69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "27e068d1b35dbec10a3cf268887c94407be4badc"
            },
            {
              "version": "69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d48ea5c9c4c34dc0df621f0e39ed3a16b644621a"
            },
            {
              "version": "69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "21b5953e7494c16a42e6cd8cf110e18d13ae4a6b"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.31",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.31"
            },
            {
              "version": "5.10.267",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.218",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.185",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.152",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.104",
              "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": "*"
            }
          ]
        }
      ]
    }
  }
}