---
id: "CVE-2026-40426"
page: "https://infrastack.ai/live/CVE-2026-40426"
kind: "vulnerability"
aliases: ["CVE-2026-40426"]
title: "Intel NPU Driver: integer underflow lets a local user crash the system"
severity: "medium"
cvss: 5.8
epss: null
exploited: false
status: "open"
category: "vendor"
products: []
ecosystems: []
tags: ["intel-npu", "linux", "vendor", "windows"]
not_affected_if: ["driver-1.33.0-or-later", "no-intel-npu"]
published_at: "2026-11-10T17:17:42+00:00"
first_seen_at: "2026-11-10T17:22:43+00:00"
updated_at: "2026-11-10T17:24:19+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40426", "first_seen_at": "2026-11-10T17:22:43+00:00"}]
exploit_sources: []
---

# Intel NPU Driver: integer underflow lets a local user crash the system

Link for people: https://infrastack.ai/live/CVE-2026-40426 (this .md is for agents)

The Intel NPU Driver before version 1.33.0 has an integer underflow reachable from Ring 3 user applications. A local, authenticated user can trigger a denial of service that takes the system down.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Intel NPU Driver version on Windows or Linux systems with an Intel NPU and confirm whether it is below `1.33.0`.

## Fix

- Intel NPU Driver: move to `1.33.0` or later.

## Timeline

- 2026-11-10T17:22:43+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-40426

## From the sources

Integer underflow (wrap or wraparound) for the Intel(R) NPU Driver software before version 1.33.0 within Ring 3: User Applications may allow a denial of service. Unprivileged software adversary with an authenticated user combined with a low complexity attack may enable denial of service. This result may potentially occur via local access when attack requirements are present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (low), integrity (low) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.

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