---
title: "CVE-2026-89814: Linux Kernel - Out of Bounds Read/Write"
description: "Linux kernel contains an out-of-bounds array access vulnerability in drm/amdgpu caused by improper indexing of isolation array for rings outside a partition, letting attackers cause kernel crashes or undefined behavior, exploit requires crafted SDMA submissions."
url: https://panop.io/threat-heartbeat/CVE-2026-89814/
---

# CVE-2026-89814 Linux Kernel - Out of Bounds Read/Write

Linux kernel contains an out-of-bounds array access vulnerability in drm/amdgpu caused by improper indexing of isolation array for rings outside a partition, letting attackers cause kernel crashes or undefined behavior, exploit requires crafted SDMA submissions.

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-2026-89814)

## Details

Type

Out of Bounds Read/Write

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

16 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for drm/amdgpu isolation index clamping.

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-2026-89814](https://nvd.nist.gov/vuln/detail/CVE-2026-89814)
- [https://git.kernel.org/stable/c/0bfb938182d1313e5cac32ae38dbaaa4eabe4af4](https://git.kernel.org/stable/c/0bfb938182d1313e5cac32ae38dbaaa4eabe4af4)
- [https://git.kernel.org/stable/c/964de255497ffd7cb8a86e405b8ac6d927e7e177](https://git.kernel.org/stable/c/964de255497ffd7cb8a86e405b8ac6d927e7e177)
- [https://git.kernel.org/stable/c/b30900566642ceb2c9e12b56c2afec28d0fd91a0](https://git.kernel.org/stable/c/b30900566642ceb2c9e12b56c2afec28d0fd91a0)

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## 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

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