# NFSD: Fix SECINFO_NO_NAME decode error cleanup

CVE record · `CVE-2026-53398`

- **Identifiers:** `CVE-2026-53398`
- **State:** Confirmed
- **Severity:** CVSS 9.8 Critical
- **Critical:** Yes: CVSS 9+
- **CNA:** Linux
- **Weakness (CWE):** [CWE-665](https://cwe.mitre.org/data/definitions/665.html)
- **Tags:** [CWE-665](https://agentprime.io/advisories/tag/cwe-665.md)
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 19 Jul 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 19 Jul 2026, 12:01 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: `5e76b25d7cc82c148d391c0c43b884e6427cb302 to before 8836405abdc53ca3dd5fc68b2cf6f8f012fad011` (git)
  - affected: `07b68ff5c71cf4ed5443016d8eb116863c0a4d88 to before 49de5d31dd8fdebf78bdeaf196b0ca5cd5c75439` (git)
  - affected: `3fdc546462348b8a497c72bc894e0cde9f10fc40 to before 5ec37edcb534f3fc92304be236d37f08e6545585` (git)
  - affected: `3fdc546462348b8a497c72bc894e0cde9f10fc40 to before 1e04be34cafae119e82bcaccd6d28a20f72a3647` (git)
  - affected: `3fdc546462348b8a497c72bc894e0cde9f10fc40 to before 161d1aaeb04d620d3692639700512bb5038c1e10` (git)
  - affected: `3fdc546462348b8a497c72bc894e0cde9f10fc40 to before c8a24effd96d4779e2ad779654682304491c55a5` (git)
  - affected: `3fdc546462348b8a497c72bc894e0cde9f10fc40 to before 46eb17d45be69d28c7a23ea03283b207426a8232` (git)
  - affected: `3fdc546462348b8a497c72bc894e0cde9f10fc40 to before 9e18e83b8846a5c3fe13fc8a464b4865d33996c6` (git)
  - affected: `5.10.220 to before 5.10.260` (semver)
  - affected: `5.15.154 to before 5.15.211` (semver)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.1`
  - unaffected: `before 6.1` (semver)
  - unaffected: `5.10.260 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.211 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.177 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.144 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.95 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.38 to 6.18.*, inclusive` (semver)
  - unaffected: `7.1.3 to 7.1.*, inclusive` (semver)
  - unaffected: `7.2 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:** 0.0054, the 45th percentile, on 5 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 19 Jul 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-53398](https://www.cve.org/CVERecord?id=CVE-2026-53398)
- [NVD: CVE-2026-53398](https://nvd.nist.gov/vuln/detail/CVE-2026-53398)

### References from the CNA

- <https://git.kernel.org/stable/c/8836405abdc53ca3dd5fc68b2cf6f8f012fad011>
- <https://git.kernel.org/stable/c/49de5d31dd8fdebf78bdeaf196b0ca5cd5c75439>
- <https://git.kernel.org/stable/c/5ec37edcb534f3fc92304be236d37f08e6545585>
- <https://git.kernel.org/stable/c/1e04be34cafae119e82bcaccd6d28a20f72a3647>
- <https://git.kernel.org/stable/c/161d1aaeb04d620d3692639700512bb5038c1e10>
- <https://git.kernel.org/stable/c/c8a24effd96d4779e2ad779654682304491c55a5>
- <https://git.kernel.org/stable/c/46eb17d45be69d28c7a23ea03283b207426a8232>
- <https://git.kernel.org/stable/c/9e18e83b8846a5c3fe13fc8a464b4865d33996c6>

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-2026-53398>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-53398/>. Everything for agents: <https://agentprime.io/llms.txt>.