---
id: CVE-2026-109090
title: libXi XGetDeviceControl DEVICE_ENABLE Heap Buffer Overflow
summary: "A malicious X server could cause a heap overflow by injecting a large\_DEVICE_ENABLE reply when processed by libXi before 1.8.4."
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-122
vendor: x.org
product: libXi
affected:
  - libXi < 1.8.4
published: '2026-10-27'
updated: '2026-10-27'
sourceUpdated: '2026-10-27T16:32:56.867Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-109090'
references:
  - url: 'https://gitlab.freedesktop.org/xorg/lib/libxi/-/commit/4eb9f70b6'
tags:
  - cve.org
ingestedAt: '2026-10-27T17:33:23.801Z'
---

## Overview

A malicious X server could cause a heap overflow by injecting a large DEVICE_ENABLE reply when processed by libXi before 1.8.4.

## Affected

- `libXi < 1.8.4`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.