---
id: CVE-2026-93518
title: X.Org Server XKB ResizeKeyType Numeric Truncation
summary: >-
  An integer truncation issue in XkbResizeKeyType() that could lead to a heap
  buffer overflow by authenticated X clients in X.org X server before 21.1.25
  and XWayland before 24.1.14 could be exploited for crashes or potential code
  executio…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-122
vendor: x.org
product: xorg-x11-server
affected:
  - xorg-x11-server < 21.1.25
  - xwayland < 24.1.14
published: '2026-10-28'
updated: '2026-10-28'
sourceUpdated: '2026-10-28T14:32:01.702Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-93518'
references:
  - url: >-
      https://gitlab.freedesktop.org/xorg/xserver/-/commit/89101a6c6618f543d7502f2077c7ef1a507af256
tags:
  - cve.org
ingestedAt: '2026-10-28T15:13:08.983Z'
---

## Overview

An integer truncation issue in XkbResizeKeyType() that could lead to a heap buffer overflow by authenticated X clients in X.org X server before 21.1.25 and XWayland before 24.1.14 could be exploited for crashes or potential code execution in the X server.

## Affected

- `xorg-x11-server < 21.1.25`
- `xwayland < 24.1.14`

## Remediation

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