# CVE-2026-89098: Nfs-utils: nfs-utils: denial of service via assertion failure in fsidd

CVE-2026-89098 is fixed in nfs-utils on 1 platform by DEBIAN-CVE-2026-89098 (version 1:3.1.1-1), released October 17, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-89098
- Priority: Routine
- CVSS: 5.5 (Moderate)
- EPSS: 0.0015
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 16, 2026
- Weakness: Reachable Assertion
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-89098

## Description

A flaw was found in nfs-utils. The fsidd daemon improperly handles input received over its local domain socket by relying on program assertions to verify command arguments. A local user can exploit this vulnerability by sending a malformed request lacking the required arguments to trigger an assertion failure. This causes the daemon to crash, resulting in a Denial of Service (DoS) for filesystem identifier lookup services until restarted.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | nfs-utils Debian 14 | 1:3.1.1-1 | [DEBIAN-CVE-2026-89098](https://patchblox.com/security/data/fix/linux/debian-cve-2026-89098.md) | Oct 17, 2026 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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