{"id":"CVE-2026-98577","title":"nfc: llcp: fix WKS SAP hijacking via prefix match in nfc_llcp_wks_sap()","summary":"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\" match…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= d646960f7986fefb460a2b062d5ccc8ccfeacc3a < 0c83a8a45fed256ccc5fe7160b436b671fc79fb8","Linux >= d646960f7986fefb460a2b062d5ccc8ccfeacc3a < aa555ed5ed0d15efbaf27e0e9f152a6df715278a","Linux >= d646960f7986fefb460a2b062d5ccc8ccfeacc3a < 32b5f0b338bf59391a1cff9a6190a72c4d2c1ba8","Linux >= d646960f7986fefb460a2b062d5ccc8ccfeacc3a < 6fad2c34d451d11a9f3f946cae1105fee91d96b8","Linux >= d646960f7986fefb460a2b062d5ccc8ccfeacc3a < bf41af8f910cbb5d776a1dfa0671d31a7e262e28","Linux >= d646960f7986fefb460a2b062d5ccc8ccfeacc3a < f234197f3bda3aea5d4b1e591d6bcb3660a8b3fc","Linux >= d646960f7986fefb460a2b062d5ccc8ccfeacc3a < 0a0412745c86acd089c6460da715ab966b1615e7","Linux >= d646960f7986fefb460a2b062d5ccc8ccfeacc3a < 408cff6bd60636df201274d320edfdfde9ed41db","Linux 3.3"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:18:47.635Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98577","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"},{"url":"https://git.kernel.org/stable/c/0a0412745c86acd089c6460da715ab966b1615e7"},{"url":"https://git.kernel.org/stable/c/408cff6bd60636df201274d320edfdfde9ed41db"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T15:45:12.256Z","slug":"CVE-2026-98577","body":"## Overview\n\nIn 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().\n\n## Affected\n\n- `Linux >= d646960f7986fefb460a2b062d5ccc8ccfeacc3a < 0c83a8a45fed256ccc5fe7160b436b671fc79fb8`\n- `Linux >= d646960f7986fefb460a2b062d5ccc8ccfeacc3a < aa555ed5ed0d15efbaf27e0e9f152a6df715278a`\n- `Linux >= d646960f7986fefb460a2b062d5ccc8ccfeacc3a < 32b5f0b338bf59391a1cff9a6190a72c4d2c1ba8`\n- `Linux >= d646960f7986fefb460a2b062d5ccc8ccfeacc3a < 6fad2c34d451d11a9f3f946cae1105fee91d96b8`\n- `Linux >= d646960f7986fefb460a2b062d5ccc8ccfeacc3a < bf41af8f910cbb5d776a1dfa0671d31a7e262e28`\n- `Linux >= d646960f7986fefb460a2b062d5ccc8ccfeacc3a < f234197f3bda3aea5d4b1e591d6bcb3660a8b3fc`\n- `Linux >= d646960f7986fefb460a2b062d5ccc8ccfeacc3a < 0a0412745c86acd089c6460da715ab966b1615e7`\n- `Linux >= d646960f7986fefb460a2b062d5ccc8ccfeacc3a < 408cff6bd60636df201274d320edfdfde9ed41db`\n- `Linux 3.3`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}