---
id: "CVE-2026-109095"
page: "https://infrastack.ai/live/CVE-2026-109095"
kind: "vulnerability"
aliases: ["CVE-2026-109095"]
title: "X.Org Xwayland and X server: integer overflow lets clients crash or leak data"
severity: "medium"
cvss: 6.9
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["desktop", "infrastructure", "linux", "xorg", "xwayland"]
not_affected_if: ["default-config", "headless-server", "no-x-clients"]
published_at: "2026-11-13T14:17:47+00:00"
first_seen_at: "2026-11-13T15:19:48+00:00"
updated_at: "2026-11-13T15:21:23+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-109095", "first_seen_at": "2026-11-13T15:19:48+00:00"}]
exploit_sources: []
---

# X.Org Xwayland and X server: integer overflow lets clients crash or leak data

Link for people: https://infrastack.ai/live/CVE-2026-109095 (this .md is for agents)

An integer overflow in the glamor Xv image size handling of X.Org Xwayland and the X server can be triggered by an authenticated client. The result is a crash of the X server or leaked memory contents.

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

## How to check

- `Xwayland -version` or `Xorg -version` to read the installed version
- Compare against the fixed versions: Xwayland before `24.1.15` and X server before `21.1.26` are affected

## Fix

- Xwayland: move to `24.1.15` or later
- X server: move to `21.1.26` or later

## Timeline

- 2026-11-13T15:19:48+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-109095

## From the sources

A integer overflow in glamor Xv Image Size handling in X.Org xwayland before 24.1.15 and X server before 21.1.26 could be used by authenticated clients to crash the X server or leak out data.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_