# NFSv4.1: zero referring call lists before decoding

CVE record · `CVE-2026-90104`

- **Identifiers:** `CVE-2026-90104`
- **State:** Confirmed
- **Severity:** CVSS 9.8 Critical
- **Critical:** Yes: CVSS 9+
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 17 Sept 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:06 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.

## Critical

Critical, because:

- CVSS score 9.8: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `4aece6a19cf7f474f15eb861ba74db4479884ce3 to before 810f6b3a29ac96fdc16909132b31627dae6824c2` (git)
  - affected: `4aece6a19cf7f474f15eb861ba74db4479884ce3 to before ed54460caf5b5aa65ec03c9a6032d831f39f19f5` (git)
  - affected: `4aece6a19cf7f474f15eb861ba74db4479884ce3 to before 7510a5b9edec9d9536a4e69f10edfb2592e6cf7f` (git)
  - affected: `4aece6a19cf7f474f15eb861ba74db4479884ce3 to before f4d23937e1c41995c2f54af26c89b5e48a41c299` (git)
  - affected: `4aece6a19cf7f474f15eb861ba74db4479884ce3 to before f31f3c042e024aef437cda42f0424ae8d4594b6c` (git)
  - affected: `4aece6a19cf7f474f15eb861ba74db4479884ce3 to before 8fa4804fe62ca4155a2d8fc2789d630376cbf2fc` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `2.6.31`
  - unaffected: `before 2.6.31` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.114 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.57 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

- 9.8 Critical, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`, from CNA (Linux)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0073, the 54th 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-2026-90104](https://www.cve.org/CVERecord?id=CVE-2026-90104)
- [NVD: CVE-2026-90104](https://nvd.nist.gov/vuln/detail/CVE-2026-90104)

### References from the CNA

- <https://git.kernel.org/stable/c/810f6b3a29ac96fdc16909132b31627dae6824c2>
- <https://git.kernel.org/stable/c/ed54460caf5b5aa65ec03c9a6032d831f39f19f5>
- <https://git.kernel.org/stable/c/7510a5b9edec9d9536a4e69f10edfb2592e6cf7f>
- <https://git.kernel.org/stable/c/f4d23937e1c41995c2f54af26c89b5e48a41c299>
- <https://git.kernel.org/stable/c/f31f3c042e024aef437cda42f0424ae8d4594b6c>
- <https://git.kernel.org/stable/c/8fa4804fe62ca4155a2d8fc2789d630376cbf2fc>

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-2026-90104>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90104/>. Everything for agents: <https://agentprime.io/llms.txt>.