CVE-2026-98577
Published Oct 18, 2026
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().
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References
Other References
https://git.kernel.org/stable/c/0a0412745c86acd089c6460da715ab966b1615e7
https://git.kernel.org/stable/c/0c83a8a45fed256ccc5fe7160b436b671fc79fb8
https://git.kernel.org/stable/c/32b5f0b338bf59391a1cff9a6190a72c4d2c1ba8
https://git.kernel.org/stable/c/408cff6bd60636df201274d320edfdfde9ed41db
https://git.kernel.org/stable/c/6fad2c34d451d11a9f3f946cae1105fee91d96b8
https://git.kernel.org/stable/c/aa555ed5ed0d15efbaf27e0e9f152a6df715278a
https://git.kernel.org/stable/c/bf41af8f910cbb5d776a1dfa0671d31a7e262e28
https://git.kernel.org/stable/c/f234197f3bda3aea5d4b1e591d6bcb3660a8b3fc
Frequently Asked Questions
What is CVE-2026-98577? +
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().
How do I check if I'm vulnerable to CVE-2026-98577? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.