# null_blk: use DEFINE_MUTEX for the file-scope mutex

CVE record · `CVE-2026-90190`

- **Identifiers:** `CVE-2026-90190`
- **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: `49c3b9266a718dbd73c42e004288b4bb2ea0ac0b to before f9f4ca45c770b7eec83fea6c9b727b26e691b513` (git)
  - affected: `49c3b9266a718dbd73c42e004288b4bb2ea0ac0b to before 349903f7ee72f7ac5b7a98840d701b2082d140a3` (git)
  - affected: `49c3b9266a718dbd73c42e004288b4bb2ea0ac0b to before 0a8c2f7b95981913ac370683e34db4906970c210` (git)
  - affected: `49c3b9266a718dbd73c42e004288b4bb2ea0ac0b to before c7dea90c9b4ef1dfbd2e4df36de180c76fd7c33c` (git)
  - affected: `49c3b9266a718dbd73c42e004288b4bb2ea0ac0b to before 234117949da3b3f9705a21b66094f9f30bbe681d` (git)
  - affected: `49c3b9266a718dbd73c42e004288b4bb2ea0ac0b to before 017dac7670909eaea3eb36e6b3b5a8be9ce0a14d` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.19`
  - unaffected: `before 5.19` (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 10th 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-2026-90190](https://www.cve.org/CVERecord?id=CVE-2026-90190)
- [NVD: CVE-2026-90190](https://nvd.nist.gov/vuln/detail/CVE-2026-90190)

### References from the CNA

- <https://git.kernel.org/stable/c/f9f4ca45c770b7eec83fea6c9b727b26e691b513>
- <https://git.kernel.org/stable/c/349903f7ee72f7ac5b7a98840d701b2082d140a3>
- <https://git.kernel.org/stable/c/0a8c2f7b95981913ac370683e34db4906970c210>
- <https://git.kernel.org/stable/c/c7dea90c9b4ef1dfbd2e4df36de180c76fd7c33c>
- <https://git.kernel.org/stable/c/234117949da3b3f9705a21b66094f9f30bbe681d>
- <https://git.kernel.org/stable/c/017dac7670909eaea3eb36e6b3b5a8be9ce0a14d>

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-2026-90190>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90190/>. Everything for agents: <https://agentprime.io/llms.txt>.