CVE-2026-98577 (GCVE-0-2026-98577)
Vulnerability from cvelistv5
Published
2026-10-18 15:18
Modified
2026-10-19 09:22
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: nfc: llcp: fix WKS SAP hijacking via prefix match in nfc_llcp_wks_sap() nfc_llcp_wks_sap() compares only service_name_len bytes, so a short service_name like "u" matches longer WKS strings like "urn:nfc:sn:snep". Fix by requiring exact length match before strncmp().
References
Impacted products
Vendor Product Version
Linux Linux Version: d646960f7986fefb460a2b062d5ccc8ccfeacc3a
Version: d646960f7986fefb460a2b062d5ccc8ccfeacc3a
Version: d646960f7986fefb460a2b062d5ccc8ccfeacc3a
Version: d646960f7986fefb460a2b062d5ccc8ccfeacc3a
Version: d646960f7986fefb460a2b062d5ccc8ccfeacc3a
Version: d646960f7986fefb460a2b062d5ccc8ccfeacc3a
Version: d646960f7986fefb460a2b062d5ccc8ccfeacc3a
Version: d646960f7986fefb460a2b062d5ccc8ccfeacc3a
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{
  "containers": {
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          "programFiles": [
            "net/nfc/llcp_core.c"
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              "version": "0",
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              "status": "unaffected",
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              "lessThanOrEqual": "*",
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              "versionType": "original_commit_for_fix"
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          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: llcp: fix WKS SAP hijacking via prefix match in nfc_llcp_wks_sap()\n\nnfc_llcp_wks_sap() compares only service_name_len bytes, so a short\nservice_name like \"u\" matches longer WKS strings like \"urn:nfc:sn:snep\".\nFix by requiring exact length match before strncmp()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:22:02.632Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0c83a8a45fed256ccc5fe7160b436b671fc79fb8"
        },
        {
          "url": "https://git.kernel.org/stable/c/aa555ed5ed0d15efbaf27e0e9f152a6df715278a"
        },
        {
          "url": "https://git.kernel.org/stable/c/32b5f0b338bf59391a1cff9a6190a72c4d2c1ba8"
        },
        {
          "url": "https://git.kernel.org/stable/c/6fad2c34d451d11a9f3f946cae1105fee91d96b8"
        },
        {
          "url": "https://git.kernel.org/stable/c/bf41af8f910cbb5d776a1dfa0671d31a7e262e28"
        },
        {
          "url": "https://git.kernel.org/stable/c/f234197f3bda3aea5d4b1e591d6bcb3660a8b3fc"
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        {
          "url": "https://git.kernel.org/stable/c/0a0412745c86acd089c6460da715ab966b1615e7"
        },
        {
          "url": "https://git.kernel.org/stable/c/408cff6bd60636df201274d320edfdfde9ed41db"
        }
      ],
      "title": "nfc: llcp: fix WKS SAP hijacking via prefix match in nfc_llcp_wks_sap()",
      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98577",
    "datePublished": "2026-10-18T15:18:47.635Z",
    "dateReserved": "2026-09-25T10:25:14.358Z",
    "dateUpdated": "2026-10-19T09:22:02.632Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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