Bug 2554979 (CVE-2026-98577) - CVE-2026-98577 kernel: nfc: llcp: fix WKS SAP hijacking via prefix match in nfc_llcp_wks_sap()
Summary: CVE-2026-98577 kernel: nfc: llcp: fix WKS SAP hijacking via prefix match in n...
Keywords:
Status: NEW
Alias: CVE-2026-98577
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-18 15:37 UTC by OSIDB Bzimport
Modified: 2026-10-20 03:35 UTC (History)
17 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-10-18 15:37:07 UTC 
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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