# nfc: llcp: avoid userspace overflow on invalid optlen

CVE record · `CVE-2026-90226`

- **Identifiers:** `CVE-2026-90226`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 17 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:07 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: `26fd76cab2e61cedc5c25f7151fb31b57ddc53c7 to before 42859562b7cc4313a84a584f338118edb7087066` (git)
  - affected: `26fd76cab2e61cedc5c25f7151fb31b57ddc53c7 to before 598dcd53c52f8eeb9dd5382198c03960d5d40fcd` (git)
  - affected: `26fd76cab2e61cedc5c25f7151fb31b57ddc53c7 to before 7e40f2f5e7bc06c3ddef781180ce4f7994176547` (git)
  - affected: `26fd76cab2e61cedc5c25f7151fb31b57ddc53c7 to before 35573c6cb081af2f4a7caeea291302aca5484526` (git)
  - affected: `26fd76cab2e61cedc5c25f7151fb31b57ddc53c7 to before b4c5abaea06292e1dddb70eac1b51589b32c77a3` (git)
  - affected: `26fd76cab2e61cedc5c25f7151fb31b57ddc53c7 to before 8bf228fa02b1ed8ce622fb81fa8edc42be9aeb67` (git)
  - affected: `26fd76cab2e61cedc5c25f7151fb31b57ddc53c7 to before bd6f1277b62bc1df348ca21739df2bc546fcd493` (git)
  - affected: `26fd76cab2e61cedc5c25f7151fb31b57ddc53c7 to before 99985bfa8336fadcc69190ba2dcbd5386af3d661` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `3.10`
  - unaffected: `before 3.10` (semver)
  - unaffected: `5.10.270 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.221 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.188 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.157 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.110 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.52 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.6 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:** 0.0021, the 11th percentile, on 13 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 17 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-90226](https://www.cve.org/CVERecord?id=CVE-2026-90226)
- [NVD: CVE-2026-90226](https://nvd.nist.gov/vuln/detail/CVE-2026-90226)

### References from the CNA

- <https://git.kernel.org/stable/c/42859562b7cc4313a84a584f338118edb7087066>
- <https://git.kernel.org/stable/c/598dcd53c52f8eeb9dd5382198c03960d5d40fcd>
- <https://git.kernel.org/stable/c/7e40f2f5e7bc06c3ddef781180ce4f7994176547>
- <https://git.kernel.org/stable/c/35573c6cb081af2f4a7caeea291302aca5484526>
- <https://git.kernel.org/stable/c/b4c5abaea06292e1dddb70eac1b51589b32c77a3>
- <https://git.kernel.org/stable/c/8bf228fa02b1ed8ce622fb81fa8edc42be9aeb67>
- <https://git.kernel.org/stable/c/bd6f1277b62bc1df348ca21739df2bc546fcd493>
- <https://git.kernel.org/stable/c/99985bfa8336fadcc69190ba2dcbd5386af3d661>

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-2026-90226>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90226/>. Everything for agents: <https://agentprime.io/llms.txt>.