# Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind

CVE record · `CVE-2026-90256`

- **Identifiers:** `CVE-2026-90256`
- **State:** Confirmed
- **Severity:** CVSS 8.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 17 Sept 2026
- **Updated:** 21 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: `efc30877bd4bc85fefe98d80af60fafc86e5775e to before 0fa448369c87e20b2aeaeaca0187d698dd61f791` (git)
  - affected: `f87271d21dd4ee83857ca11b94e7b4952749bbae to before 7c032b6d48a46634cbd58aaebad2638c00ad3b51` (git)
  - affected: `ab4eedb790cae44313759b50fe47da285e2519d5 to before b495a3a9b33bc4e4613e685bf5c96c136caa22d8` (git)
  - affected: `ab4eedb790cae44313759b50fe47da285e2519d5 to before 2b66c83ff1751d6bd3201b3017206262ab46dc05` (git)
  - affected: `18ab6b6078fa8191ca30a3065d57bf35d5635761` (git)
  - affected: `6.6.84 to before 6.6.160` (semver)
  - affected: `6.12.20 to before 6.12.114` (semver)
  - affected: `6.13.8 to before 6.14` (semver)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.14`
  - unaffected: `before 6.14` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.114 to 6.12.*, 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

- 8.8 High, CVSS 3.1: `CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`, from CNA (Linux)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0032, the 25th 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-2026-90256](https://www.cve.org/CVERecord?id=CVE-2026-90256)
- [NVD: CVE-2026-90256](https://nvd.nist.gov/vuln/detail/CVE-2026-90256)

### References from the CNA

- <https://git.kernel.org/stable/c/0fa448369c87e20b2aeaeaca0187d698dd61f791>
- <https://git.kernel.org/stable/c/7c032b6d48a46634cbd58aaebad2638c00ad3b51>
- <https://git.kernel.org/stable/c/b495a3a9b33bc4e4613e685bf5c96c136caa22d8>
- <https://git.kernel.org/stable/c/2b66c83ff1751d6bd3201b3017206262ab46dc05>

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-2026-90256>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90256/>. Everything for agents: <https://agentprime.io/llms.txt>.