# mtd: ubi: Release device reference on busy detach

CVE record · `CVE-2026-90215`

- **Identifiers:** `CVE-2026-90215`
- **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: `7e84c961b2eb062d2f47037dcca52dcd1d3615b5 to before 87812858c4c8df979cb70bcd0040b925a543df6f` (git)
  - affected: `7e84c961b2eb062d2f47037dcca52dcd1d3615b5 to before e065960366b55ab21e6c643c30dec2a41451900b` (git)
  - affected: `7e84c961b2eb062d2f47037dcca52dcd1d3615b5 to before 851c5e9a829d56cb0982965f07ef8966a6722884` (git)
  - affected: `7e84c961b2eb062d2f47037dcca52dcd1d3615b5 to before 31dd710cd84d5dd63c49f640d3a9f36c9699ca95` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.9`
  - unaffected: `before 6.9` (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-2026-90215](https://www.cve.org/CVERecord?id=CVE-2026-90215)
- [NVD: CVE-2026-90215](https://nvd.nist.gov/vuln/detail/CVE-2026-90215)

### References from the CNA

- <https://git.kernel.org/stable/c/87812858c4c8df979cb70bcd0040b925a543df6f>
- <https://git.kernel.org/stable/c/e065960366b55ab21e6c643c30dec2a41451900b>
- <https://git.kernel.org/stable/c/851c5e9a829d56cb0982965f07ef8966a6722884>
- <https://git.kernel.org/stable/c/31dd710cd84d5dd63c49f640d3a9f36c9699ca95>

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-2026-90215>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90215/>. Everything for agents: <https://agentprime.io/llms.txt>.