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

CVE record · `CVE-2026-98577`

- **Identifiers:** `CVE-2026-98577`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 18 Oct 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 18 Oct 2026, 15:18 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `d646960f7986fefb460a2b062d5ccc8ccfeacc3a to before 0c83a8a45fed256ccc5fe7160b436b671fc79fb8` (git)
  - affected: `d646960f7986fefb460a2b062d5ccc8ccfeacc3a to before aa555ed5ed0d15efbaf27e0e9f152a6df715278a` (git)
  - affected: `d646960f7986fefb460a2b062d5ccc8ccfeacc3a to before 32b5f0b338bf59391a1cff9a6190a72c4d2c1ba8` (git)
  - affected: `d646960f7986fefb460a2b062d5ccc8ccfeacc3a to before 6fad2c34d451d11a9f3f946cae1105fee91d96b8` (git)
  - affected: `d646960f7986fefb460a2b062d5ccc8ccfeacc3a to before bf41af8f910cbb5d776a1dfa0671d31a7e262e28` (git)
  - affected: `d646960f7986fefb460a2b062d5ccc8ccfeacc3a to before f234197f3bda3aea5d4b1e591d6bcb3660a8b3fc` (git)
  - affected: `d646960f7986fefb460a2b062d5ccc8ccfeacc3a to before 0a0412745c86acd089c6460da715ab966b1615e7` (git)
  - affected: `d646960f7986fefb460a2b062d5ccc8ccfeacc3a to before 408cff6bd60636df201274d320edfdfde9ed41db` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `3.3`
  - unaffected: `before 3.3` (semver)
  - unaffected: `5.10.271 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.222 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.189 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.158 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.112 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.55 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.9 to 7.2.*, inclusive` (semver)
  - unaffected: `7.3 to *, inclusive` (original_commit_for_fix)
  - Other versions: affected

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** 0.0022, the 12th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 18 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-98577](https://www.cve.org/CVERecord?id=CVE-2026-98577)
- [NVD: CVE-2026-98577](https://nvd.nist.gov/vuln/detail/CVE-2026-98577)

### References from the CNA

- <https://git.kernel.org/stable/c/0c83a8a45fed256ccc5fe7160b436b671fc79fb8>
- <https://git.kernel.org/stable/c/aa555ed5ed0d15efbaf27e0e9f152a6df715278a>
- <https://git.kernel.org/stable/c/32b5f0b338bf59391a1cff9a6190a72c4d2c1ba8>
- <https://git.kernel.org/stable/c/6fad2c34d451d11a9f3f946cae1105fee91d96b8>
- <https://git.kernel.org/stable/c/bf41af8f910cbb5d776a1dfa0671d31a7e262e28>
- <https://git.kernel.org/stable/c/f234197f3bda3aea5d4b1e591d6bcb3660a8b3fc>
- <https://git.kernel.org/stable/c/0a0412745c86acd089c6460da715ab966b1615e7>
- <https://git.kernel.org/stable/c/408cff6bd60636df201274d320edfdfde9ed41db>

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2026-98577>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98577/>. Everything for agents: <https://agentprime.io/llms.txt>.