---
id: CVE-2026-93544
title: >-
  An out-of-bounds read in libXi's XI2 XIQueryDevice reply parsing in libXi
  before 1.8.4 can be used by a malicious X server to crash an attached X
  client.
summary: >-
  An out-of-bounds read in libXi's XI2 XIQueryDevice reply parsing in libXi
  before 1.8.4 can be used by a malicious X server to crash an attached X
  client.
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-125
vendor: x.org
product: libXi
affected:
  - libXi < 1.8.4
published: '2026-09-24'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T21:00:46.893'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93544'
references:
  - url: >-
      https://gitlab.freedesktop.org/xorg/lib/libxi/-/merge_requests/23/diffs?commit_id=a88a341135b79f6ed450f481e4a5d6ba502382af
    label: meissner@suse.de
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-24T17:16:25.106730Z'
ingestedAt: '2026-09-24T16:47:15.856Z'
---

## Overview

An out-of-bounds read in libXi's XI2 XIQueryDevice reply parsing in libXi before 1.8.4 can be used by a malicious X server to crash an attached X client.

## Remediation

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