---
title: "CVE-2026-89584: Linux Kernel - Misconfiguration"
description: "Linux kernel contains a validation bypass caused by improper checking of user space vectors alignment in bio-based and stacking block drivers, letting attackers cause errors or crashes, exploit requires crafted bio vectors."
url: https://panop.io/threat-heartbeat/CVE-2026-89584/
---

# CVE-2026-89584 Linux Kernel - Misconfiguration

Linux kernel contains a validation bypass caused by improper checking of user space vectors alignment in bio-based and stacking block drivers, letting attackers cause errors or crashes, exploit requires crafted bio vectors.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.17% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89584)

## Details

Type

Misconfiguration

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 with the fix.

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-2026-89584](https://nvd.nist.gov/vuln/detail/CVE-2026-89584)
- [https://git.kernel.org/stable/c/14b007e178811db72fbb1ebb3535160db6ec1e6a](https://git.kernel.org/stable/c/14b007e178811db72fbb1ebb3535160db6ec1e6a)
- [https://git.kernel.org/stable/c/d44a97a3b1c00cc571245124e23e5ceb0a0225a0](https://git.kernel.org/stable/c/d44a97a3b1c00cc571245124e23e5ceb0a0225a0)

[← 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)