{
  "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-2026-80823",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-80823",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-04T15:27:46.153Z",
    "updatedAt": "2026-10-19T08:44:15.864Z",
    "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: st21nfca: validate ATR_REQ length against the received frame",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: st21nfca: validate ATR_REQ length against the received frame\n\nst21nfca_tm_recv_atr_req() checks that the received ATR_REQ frame is at\nleast ST21NFCA_ATR_REQ_MIN_SIZE and that the self-declared atr_req->length\nis at least sizeof(struct st21nfca_atr_req), but never checks that\natr_req->length does not exceed the actual received length (skb->len).\n\nst21nfca_tm_send_atr_res() then trusts the declared length:\n\n\tgb_len = atr_req->length - sizeof(struct st21nfca_atr_req);\n\t...\n\tmemcpy(atr_res->gbi, atr_req->gbi, gb_len);\n\nso an RF peer that sends a short frame but sets atr_req->length larger\nthan the frame makes gb_len exceed the general bytes actually present,\nand the memcpy reads out of bounds past the received skb. Those bytes are\nplaced in the ATR_RES and sent back to the peer (kernel-memory disclosure\nto a proximity attacker); a larger declared length is an out-of-bounds\nread (DoS).\n\nReject frames whose declared length exceeds the received length. The\nadjacent nfc_tm_activated() path in the same function already derives its\ngeneral-bytes length from skb->len rather than the declared field.\n\nFound by 0sec (https://0sec.ai) using automated source analysis; the\nmissing bound is evident from source. Compile-tested.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "1892bf844ea0261736bd5e75546fc996e9daeedf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "785df00bb3ae3206674a43284eb06dac575b5c64"
            },
            {
              "version": "1892bf844ea0261736bd5e75546fc996e9daeedf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2c1ad291f4cdc357f9527b688c6fda9c6ffa7890"
            },
            {
              "version": "1892bf844ea0261736bd5e75546fc996e9daeedf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "dd26d30f40c43ad9cfe2f25c6ea0ead1dd51d5aa"
            },
            {
              "version": "1892bf844ea0261736bd5e75546fc996e9daeedf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9635507fe82949e429b3cd938876a9917125b151"
            },
            {
              "version": "1892bf844ea0261736bd5e75546fc996e9daeedf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0f344944c506b4f02d2b098489f7268b438c369e"
            },
            {
              "version": "1892bf844ea0261736bd5e75546fc996e9daeedf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "bfcca5f42c9aa4eadef1e5fe7bb23783d7fcc96d"
            },
            {
              "version": "1892bf844ea0261736bd5e75546fc996e9daeedf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "304f5b414f4051d324b8c4a3ab0e79f7dc7e150e"
            },
            {
              "version": "1892bf844ea0261736bd5e75546fc996e9daeedf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f33cecf69095c43be88567fef92b180b858f7369"
            },
            {
              "version": "1892bf844ea0261736bd5e75546fc996e9daeedf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5cdcca5d62a66eda6b774110a44cba67bc1a8d1d"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.17",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.17"
            },
            {
              "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": "*"
            }
          ]
        }
      ]
    }
  }
}