---
title: "CVE-2026-89967: Linux Kernel - Out-of-Bounds Write"
description: "Linux kernel contains an out-of-bounds write vulnerability in mm/migrate_device caused by improper handling of compound folios in migrate_device_range() and migrate_device_pfns(), letting attackers cause memory corruption, exploit requires local access."
url: https://panop.io/threat-heartbeat/CVE-2026-89967/
---

# CVE-2026-89967 Linux Kernel - Out-of-Bounds Write

Linux kernel contains an out-of-bounds write vulnerability in mm/migrate\_device caused by improper handling of compound folios in migrate\_device\_range() and migrate\_device\_pfns(), letting attackers cause memory corruption, exploit requires local access.

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-2026-89967)

## Details

Type

Out-of-Bounds Write

Impact

Privilege Escalation, 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 mm/migrate\_device.

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-2026-89967](https://nvd.nist.gov/vuln/detail/CVE-2026-89967)
- [https://git.kernel.org/stable/c/99186b185c245f5987d7f8715d5504c8d8cc04a0](https://git.kernel.org/stable/c/99186b185c245f5987d7f8715d5504c8d8cc04a0)
- [https://git.kernel.org/stable/c/dc41e961a269f2ca4196e669d6d8e05480899cd4](https://git.kernel.org/stable/c/dc41e961a269f2ca4196e669d6d8e05480899cd4)

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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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