---
title: "CVE-2026-90244: Linux Kernel - Race Condition"
description: "Linux kernel iommu/dma contains a race condition caused by missing locking around msi_page_list in merged iommu domains, letting attackers cause data corruption, exploit requires concurrent device access in merged domain."
url: https://panop.io/threat-heartbeat/CVE-2026-90244/
---

# CVE-2026-90244 Linux Kernel - Race Condition

Linux kernel iommu/dma contains a race condition caused by missing locking around msi\_page\_list in merged iommu domains, letting attackers cause data corruption, exploit requires concurrent device access in merged domain.

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-2026-90244)

## Details

Type

Race Condition

Impact

Denial Of Service, Data Tampering

CVSS vector

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

Published

17 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for iommu/dma locking restoration.

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-2026-90244](https://nvd.nist.gov/vuln/detail/CVE-2026-90244)
- [https://git.kernel.org/stable/c/5a9e89ea34e0e34ac5d7e949042d665533549e40](https://git.kernel.org/stable/c/5a9e89ea34e0e34ac5d7e949042d665533549e40)
- [https://git.kernel.org/stable/c/e3c53e9173a47d5ce1fae020f2c6b1fb3c1123c2](https://git.kernel.org/stable/c/e3c53e9173a47d5ce1fae020f2c6b1fb3c1123c2)
- [https://git.kernel.org/stable/c/2af1e99ec14d226d66ceb9f16c663ee2568e6676](https://git.kernel.org/stable/c/2af1e99ec14d226d66ceb9f16c663ee2568e6676)

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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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