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CVE-2026-98577

nfc: llcp: fix WKS SAP hijacking via prefix match in nfc_llcp_wks_sap()

Description

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().

Timeline

  1. ID reserved

    By Linux

  2. · 23 days later

    Published

  3. · 1 day later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.

EPSS (exploitation in 30 days)
0.22% · top 88% of all CVEs (11 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.

Affected products

  • Linux · Linux

    • affected d646960f7986fefb460a2b062d5ccc8ccfeacc3a – < 0c83a8a45fed256ccc5fe7160b436b671fc79fb8
    • affected d646960f7986fefb460a2b062d5ccc8ccfeacc3a – < aa555ed5ed0d15efbaf27e0e9f152a6df715278a
    • affected d646960f7986fefb460a2b062d5ccc8ccfeacc3a – < 32b5f0b338bf59391a1cff9a6190a72c4d2c1ba8
    • affected d646960f7986fefb460a2b062d5ccc8ccfeacc3a – < 6fad2c34d451d11a9f3f946cae1105fee91d96b8
    • affected d646960f7986fefb460a2b062d5ccc8ccfeacc3a – < bf41af8f910cbb5d776a1dfa0671d31a7e262e28
    • affected d646960f7986fefb460a2b062d5ccc8ccfeacc3a – < f234197f3bda3aea5d4b1e591d6bcb3660a8b3fc
    • affected d646960f7986fefb460a2b062d5ccc8ccfeacc3a – < 0a0412745c86acd089c6460da715ab966b1615e7
    • affected d646960f7986fefb460a2b062d5ccc8ccfeacc3a – < 408cff6bd60636df201274d320edfdfde9ed41db
  • Linux · Linux

    • affected 3.3
    • unaffected < 3.3
    • unaffected 5.10.271 – ≤ 5.10.*
    • unaffected 5.15.222 – ≤ 5.15.*
    • unaffected 6.1.189 – ≤ 6.1.*
    • unaffected 6.6.158 – ≤ 6.6.*
    • unaffected 6.12.112 – ≤ 6.12.*
    • unaffected 6.18.55 – ≤ 6.18.*
    • unaffected 7.2.9 – ≤ 7.2.*
    • unaffected 7.3 – ≤ *

References

References8

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .