What is CVE-2026-98577?

CVE-2026-98577 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 3.3 onward and patched in 5.10.271, 5.15.222, 6.1.189 and others. CVE-2026-98577 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-98577?

CVE-2026-98577 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2026-98577?

Yes, CVE-2026-98577 has been patched. Fixed versions include 5.10.271, 5.15.222, 6.1.189 and others. If you are running Linux kernel 3.3 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-98577 actively exploited?

CVE-2026-98577 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

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().

Package Linux Kernel

Published 2026-10-18

Last modified 2026-10-18

Patch available

Yes

Affected versions

Linux kernel versions 3.3 and later are affected. Fixed in 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.112, 6.18.55, 7.2.9, 7.3 and their respective stable series.

Affected from

≥ 3.3

Fixed in

✓ 5.10.271 5.10.x ✓ 5.15.222 5.15.x ✓ 6.1.189 6.1.x ✓ 6.6.158 6.6.x ✓ 6.12.112 6.12.x ✓ 6.18.55 6.18.x ✓ 7.2.9 7.2.x ✓ 7.3

References

8 total

Showing 5 of 8 references View all on NVD

Frequently asked questions

What is CVE-2026-98577?

CVE-2026-98577 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 3.3 onward and has been patched in 5.10.271, 5.15.222, 6.1.189 and others. CVE-2026-98577 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2026-98577?

Yes. CVE-2026-98577 has been patched. Fixed versions include 5.10.271, 5.15.222, 6.1.189 and others. If you are running Linux kernel 3.3 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-98577 actively exploited?

No. CVE-2026-98577 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.