---
title: "CVE-2026-89744: Linux Kernel - Denial of Service"
description: "Linux kernel contains an infinite loop vulnerability in fwnode_for_each_child_node() caused by incorrect handling of secondary fwnode children in fwnode_get_next_child_node(), letting attackers cause denial of service by infinite iteration, exploit requires crafted device tree nodes."
url: https://panop.io/threat-heartbeat/CVE-2026-89744/
---

# CVE-2026-89744 Linux Kernel - Denial of Service

Linux kernel contains an infinite loop vulnerability in fwnode\_for\_each\_child\_node() caused by incorrect handling of secondary fwnode children in fwnode\_get\_next\_child\_node(), letting attackers cause denial of service by infinite iteration, exploit requires crafted device tree nodes.

CVSS base score 8.4 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.14% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89744)

## Details

Type

Denial of Service

Impact

Denial Of Service

CVSS vector

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

Published

11 September 2026

Updated

15 October 2026

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-89744](https://nvd.nist.gov/vuln/detail/CVE-2026-89744)
- [https://git.kernel.org/stable/c/1900692555826753adab8799a1a8d50bb1ee200c](https://git.kernel.org/stable/c/1900692555826753adab8799a1a8d50bb1ee200c)
- [https://git.kernel.org/stable/c/20ed517e416df89448029293304c9e180c26cd4b](https://git.kernel.org/stable/c/20ed517e416df89448029293304c9e180c26cd4b)
- [https://git.kernel.org/stable/c/9cb6b223ef02cb5c9777a852ae1ecf5796987eb6](https://git.kernel.org/stable/c/9cb6b223ef02cb5c9777a852ae1ecf5796987eb6)
- [https://git.kernel.org/stable/c/ba69d892ff4e4a58cc12a2cae106b112db3306cc](https://git.kernel.org/stable/c/ba69d892ff4e4a58cc12a2cae106b112db3306cc)
- [https://git.kernel.org/stable/c/04004fa33730031392d987a9c1bbd8a0e1c4794b](https://git.kernel.org/stable/c/04004fa33730031392d987a9c1bbd8a0e1c4794b)
- [https://git.kernel.org/stable/c/f4ae79b5f00130aacaddb1f3eb2e5ef711fbf9e0](https://git.kernel.org/stable/c/f4ae79b5f00130aacaddb1f3eb2e5ef711fbf9e0)

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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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