# net: bridge: Reject descending VLAN tunnel ranges

CVE record · `CVE-2026-90114`

- **Identifiers:** `CVE-2026-90114`
- **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, 16:06 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: `94339443686b36d3223bc032b7947267474e2679 to before 1181f6bad009408a259bab6aaf0681f11b487972` (git)
  - affected: `94339443686b36d3223bc032b7947267474e2679 to before 5a8e0e3a18b5e3172343b8479c5d04187f5b4795` (git)
  - affected: `94339443686b36d3223bc032b7947267474e2679 to before 0874a6d5275091429ec4c675c54c53a8776665ae` (git)
  - affected: `94339443686b36d3223bc032b7947267474e2679 to before 4b0f5b25f114651f03058395b490626c4444875e` (git)
  - affected: `94339443686b36d3223bc032b7947267474e2679 to before bd741b819ff1c239d26cc5b0f0e6b1fd4e67ed17` (git)
  - affected: `94339443686b36d3223bc032b7947267474e2679 to before c0444d7499f113d6b7803ef0175591464e17525e` (git)
  - affected: `94339443686b36d3223bc032b7947267474e2679 to before 434849b21ef56b09d16e6366b2a230002f363e45` (git)
  - affected: `94339443686b36d3223bc032b7947267474e2679 to before b74a072d8fb71d3c9ffba4a17d5943e63266fb38` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.9`
  - unaffected: `before 5.9` (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:** 0.0022, the 12th 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-2026-90114](https://www.cve.org/CVERecord?id=CVE-2026-90114)
- [NVD: CVE-2026-90114](https://nvd.nist.gov/vuln/detail/CVE-2026-90114)

### References from the CNA

- <https://git.kernel.org/stable/c/1181f6bad009408a259bab6aaf0681f11b487972>
- <https://git.kernel.org/stable/c/5a8e0e3a18b5e3172343b8479c5d04187f5b4795>
- <https://git.kernel.org/stable/c/0874a6d5275091429ec4c675c54c53a8776665ae>
- <https://git.kernel.org/stable/c/4b0f5b25f114651f03058395b490626c4444875e>
- <https://git.kernel.org/stable/c/bd741b819ff1c239d26cc5b0f0e6b1fd4e67ed17>
- <https://git.kernel.org/stable/c/c0444d7499f113d6b7803ef0175591464e17525e>
- <https://git.kernel.org/stable/c/434849b21ef56b09d16e6366b2a230002f363e45>
- <https://git.kernel.org/stable/c/b74a072d8fb71d3c9ffba4a17d5943e63266fb38>

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-2026-90114>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90114/>. Everything for agents: <https://agentprime.io/llms.txt>.