# null_blk: register configfs subsystem after creating default devices

CVE record · `CVE-2026-90189`

- **Identifiers:** `CVE-2026-90189`
- **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: `3bf2bd20734e3e6ffda53719a9c10fb3ee9c5ffa to before 2679b11e9256bd70a5ef41783bab6ad6c34a3db1` (git)
  - affected: `3bf2bd20734e3e6ffda53719a9c10fb3ee9c5ffa to before dbcedbe4819ae21274ea77469e61e46a878b9943` (git)
  - affected: `3bf2bd20734e3e6ffda53719a9c10fb3ee9c5ffa to before 57debc907aef66319d244009d3370dcd97388d37` (git)
  - affected: `3bf2bd20734e3e6ffda53719a9c10fb3ee9c5ffa to before d761be1b8f2bbabc41252deb79a426d3f0d4fa10` (git)
  - affected: `3bf2bd20734e3e6ffda53719a9c10fb3ee9c5ffa to before cab9bf5f68f76cd44e0ec92bd4a60c9b83656a36` (git)
  - affected: `3bf2bd20734e3e6ffda53719a9c10fb3ee9c5ffa to before c9d293d6bb0575fcb1f3408129453187e2a28a4e` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.14`
  - unaffected: `before 4.14` (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:** 0.0017, the 6th 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-2026-90189](https://www.cve.org/CVERecord?id=CVE-2026-90189)
- [NVD: CVE-2026-90189](https://nvd.nist.gov/vuln/detail/CVE-2026-90189)

### References from the CNA

- <https://git.kernel.org/stable/c/2679b11e9256bd70a5ef41783bab6ad6c34a3db1>
- <https://git.kernel.org/stable/c/dbcedbe4819ae21274ea77469e61e46a878b9943>
- <https://git.kernel.org/stable/c/57debc907aef66319d244009d3370dcd97388d37>
- <https://git.kernel.org/stable/c/d761be1b8f2bbabc41252deb79a426d3f0d4fa10>
- <https://git.kernel.org/stable/c/cab9bf5f68f76cd44e0ec92bd4a60c9b83656a36>
- <https://git.kernel.org/stable/c/c9d293d6bb0575fcb1f3408129453187e2a28a4e>

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-2026-90189>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90189/>. Everything for agents: <https://agentprime.io/llms.txt>.