{
  "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-2026-80798",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-80798",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-04T15:13:12.282Z",
    "updatedAt": "2026-10-19T08:43:51.441Z",
    "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": "nfc: llcp: reject PDUs shorter than the LLCP header",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: llcp: reject PDUs shorter than the LLCP header\n\nEvery LLCP PDU begins with a two-byte header (DSAP/SSAP + PTYPE), but the\nreceive path never checked that a frame is at least LLCP_HEADER_SIZE bytes\nbefore parsing it.\n\nnfc_llcp_rx_skb() reads the header via nfc_llcp_ptype()/nfc_llcp_dsap()/\nnfc_llcp_ssap(), which dereference pdu->data[0] and pdu->data[1], and a\nCONNECT or CC PDU then computes\n\n\ttlv_array_len = skb->len - LLCP_HEADER_SIZE;\n\nas a size_t and hands it to the TLV walk. When the frame is shorter than\nthe header the subtraction wraps to a huge value and the walk runs far\npast the buffer, an out-of-bounds read.\n\nA nearby NFC device can reach this without authentication; LLCP link\nactivation happens automatically after NFC-DEP.\n\nGuard the common receive choke point __nfc_llcp_recv(), shared by both the\ntarget (nfc_llcp_data_received()) and initiator (nfc_llcp_recv()) paths, so\na short skb is dropped before the rx_work worker parses it. Use\npskb_may_pull() rather than a skb->len test so the two header bytes are\nguaranteed to sit in the skb linear area even for a non-linear skb,\nmatching how the sibling NCI and HCI receive paths validate their headers.\n\nReproduced with a KFENCE out-of-bounds read via /dev/virtual_nci on\nlinux-next.\n\nFound by 0sec automated security-research tooling (https://0sec.ai).",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "d646960f7986fefb460a2b062d5ccc8ccfeacc3a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e6ec76a68dce04884dfeccfe5a5f0e9f67c0ec82"
            },
            {
              "version": "d646960f7986fefb460a2b062d5ccc8ccfeacc3a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f36cffea24bf3e2cc29a00d4b51dbcadc087d810"
            },
            {
              "version": "d646960f7986fefb460a2b062d5ccc8ccfeacc3a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a7b9b449f5a5132221fff6adc11a9431ab8cd914"
            },
            {
              "version": "d646960f7986fefb460a2b062d5ccc8ccfeacc3a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3793d768b40f38bb97265dd5b9a8b8655c4e1b1d"
            },
            {
              "version": "d646960f7986fefb460a2b062d5ccc8ccfeacc3a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "eab47618e282602197db287ecbd1b09d356a2515"
            },
            {
              "version": "d646960f7986fefb460a2b062d5ccc8ccfeacc3a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e969e98410051b1ef8cc318bfe0c7e3f24ec766d"
            },
            {
              "version": "d646960f7986fefb460a2b062d5ccc8ccfeacc3a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ae5f20f5842f440b72d030e3a34fe182dd8eae42"
            },
            {
              "version": "d646960f7986fefb460a2b062d5ccc8ccfeacc3a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d3d90243393c48146911c67fd3792b549d21d9e6"
            },
            {
              "version": "d646960f7986fefb460a2b062d5ccc8ccfeacc3a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "95674f506c6376d6722a23144c9acd26609771ed"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.3",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.3"
            },
            {
              "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": "6.6.154",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.106",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.47",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.1.11",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "version": "7.2.1",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}