# net/sched: cls_api: fix teardown of an adopted proto on insert-race loss

CVE record · `CVE-2026-90248`

- **Identifiers:** `CVE-2026-90248`
- **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: `8b64678e0af8f4d62a40149baedebe78503a5255 to before a68e664ddf16ecae6d769d6a2eb356f8abab75c9` (git)
  - affected: `8b64678e0af8f4d62a40149baedebe78503a5255 to before df02b6dc136af45e92ee4c86f4aa6c9a60790b1e` (git)
  - affected: `8b64678e0af8f4d62a40149baedebe78503a5255 to before bee2208276c8e0e40a249ffdcf6e5434a79a847c` (git)
  - affected: `8b64678e0af8f4d62a40149baedebe78503a5255 to before 219c87aeefdcc8c1caf28cc99e9b361ce7393d3a` (git)
  - affected: `8b64678e0af8f4d62a40149baedebe78503a5255 to before bbe2fd6d77df630356185406a97317f6aa6a92cf` (git)
  - affected: `8b64678e0af8f4d62a40149baedebe78503a5255 to before dc8b33b819cb02a75936940c120aa669ad89942d` (git)
  - affected: `8b64678e0af8f4d62a40149baedebe78503a5255 to before d4e359b3608a0e184bbe8d61a5c3b50d0831c44a` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.1`
  - unaffected: `before 5.1` (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-2026-90248](https://www.cve.org/CVERecord?id=CVE-2026-90248)
- [NVD: CVE-2026-90248](https://nvd.nist.gov/vuln/detail/CVE-2026-90248)

### References from the CNA

- <https://git.kernel.org/stable/c/a68e664ddf16ecae6d769d6a2eb356f8abab75c9>
- <https://git.kernel.org/stable/c/df02b6dc136af45e92ee4c86f4aa6c9a60790b1e>
- <https://git.kernel.org/stable/c/bee2208276c8e0e40a249ffdcf6e5434a79a847c>
- <https://git.kernel.org/stable/c/219c87aeefdcc8c1caf28cc99e9b361ce7393d3a>
- <https://git.kernel.org/stable/c/bbe2fd6d77df630356185406a97317f6aa6a92cf>
- <https://git.kernel.org/stable/c/dc8b33b819cb02a75936940c120aa669ad89942d>
- <https://git.kernel.org/stable/c/d4e359b3608a0e184bbe8d61a5c3b50d0831c44a>

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-2026-90248>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90248/>. Everything for agents: <https://agentprime.io/llms.txt>.