---
title: "CVE-2026-89668: Linux Kernel - Resource Management Issue"
description: "Linux kernel contains a resource management vulnerability caused by improper initialization order in nfsd_debugfs_init() and nfsd4_init_slabs(), letting kernel modules leave orphan debugfs files with stale pointers, exploit requires slab allocation failure."
url: https://panop.io/threat-heartbeat/CVE-2026-89668/
---

# CVE-2026-89668 Linux Kernel - Resource Management Issue

Linux kernel contains a resource management vulnerability caused by improper initialization order in nfsd\_debugfs\_init() and nfsd4\_init\_slabs(), letting kernel modules leave orphan debugfs files with stale pointers, exploit requires slab allocation failure.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.18% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89668)

## Details

Type

Resource Management Issue

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Published

11 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for nfsd initialization order.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-89668](https://nvd.nist.gov/vuln/detail/CVE-2026-89668)
- [https://git.kernel.org/stable/c/2c390c8a1764d67095fe444401861fac4c049362](https://git.kernel.org/stable/c/2c390c8a1764d67095fe444401861fac4c049362)
- [https://git.kernel.org/stable/c/4ae5d7490ae6a7b83b3d607f88c499f4f85e753a](https://git.kernel.org/stable/c/4ae5d7490ae6a7b83b3d607f88c499f4f85e753a)
- [https://git.kernel.org/stable/c/ab43ff94f5dfc2b6a080b167b69855eb7655c98b](https://git.kernel.org/stable/c/ab43ff94f5dfc2b6a080b167b69855eb7655c98b)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)