# efivarfs: Rate limit statfs() handler

CVE record · `CVE-2026-89604`

- **Identifiers:** `CVE-2026-89604`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 11 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 11 Sept 2026, 19:45 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: `115409cbb6a296d73702a62c54c5b1b11cb88b3d to before 97d71ebee48cd1b29091762b3e5cca4f815dd84c` (git)
  - affected: `d86ff3333cb1d5f42d8898fb5fdb304e143c0237 to before 3cd611c9f1dbcc116c8af5112e3c1783c8cde2ae` (git)
  - affected: `d86ff3333cb1d5f42d8898fb5fdb304e143c0237 to before 8953bdd1b9c0e748d5408d3d0b8e7aeee5c9cd41` (git)
  - affected: `d86ff3333cb1d5f42d8898fb5fdb304e143c0237 to before 92895a14329cc9533e2a74a265214f690ba3851a` (git)
  - affected: `d86ff3333cb1d5f42d8898fb5fdb304e143c0237 to before 0dbc2e94b81df5a1264068b6ed3605c654b8afcb` (git)
  - affected: `d86ff3333cb1d5f42d8898fb5fdb304e143c0237 to before b2326338dc683e8c1067c0cbf7a47986c4190902` (git)
  - affected: `6.1.178 to before 6.1.188` (semver)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.5`
  - unaffected: `before 6.5` (semver)
  - unaffected: `6.1.188 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.157 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.109 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.50 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.4 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 14 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 11 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89604](https://www.cve.org/CVERecord?id=CVE-2026-89604)
- [NVD: CVE-2026-89604](https://nvd.nist.gov/vuln/detail/CVE-2026-89604)

### References from the CNA

- <https://git.kernel.org/stable/c/97d71ebee48cd1b29091762b3e5cca4f815dd84c>
- <https://git.kernel.org/stable/c/3cd611c9f1dbcc116c8af5112e3c1783c8cde2ae>
- <https://git.kernel.org/stable/c/8953bdd1b9c0e748d5408d3d0b8e7aeee5c9cd41>
- <https://git.kernel.org/stable/c/92895a14329cc9533e2a74a265214f690ba3851a>
- <https://git.kernel.org/stable/c/0dbc2e94b81df5a1264068b6ed3605c654b8afcb>
- <https://git.kernel.org/stable/c/b2326338dc683e8c1067c0cbf7a47986c4190902>

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-2026-89604>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89604/>. Everything for agents: <https://agentprime.io/llms.txt>.