---
id: "CVE-2026-109091"
page: "https://infrastack.ai/live/CVE-2026-109091"
kind: "vulnerability"
aliases: ["CVE-2026-109091"]
title: "X.Org X Server and Xwayland: EDID display-range buffer overflow lets monitors crash or run code"
severity: "high"
cvss: 7.8
epss: null
exploited: false
status: "open"
category: "runtime"
products: [{"name": "X.Org xwayland", "fixed": [], "affected": "", "ecosystem": "runtime"}]
ecosystems: ["runtime"]
tags: ["linux", "runtime", "x-server", "x.org", "xwayland"]
not_affected_if: ["fixed-version"]
published_at: "2026-11-13T16:17:25+00:00"
first_seen_at: "2026-11-13T16:47:32+00:00"
updated_at: "2026-11-13T16:48:31+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-109091", "first_seen_at": "2026-11-13T16:47:32+00:00"}]
exploit_sources: []
---

# X.Org X Server and Xwayland: EDID display-range buffer overflow lets monitors crash or run code

Link for people: https://infrastack.ai/live/CVE-2026-109091 (this .md is for agents)

A buffer overflow in how X.Org X Server and Xwayland parse EDID display-range descriptors can be triggered by a malicious monitor. The sources say it can crash the X server or execute code.

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

## Affected

- runtime:X.Org xwayland affected range not listed fixed no fixed version listed

## How to check

- Check the installed X server version with `Xorg -version` or `Xwayland -version`
- Compare it with the fixed ranges: Xwayland before `24.1.15` and X Server before `21.1.26` are affected

## Fix

- Xwayland: `24.1.15`
- X Server: `21.1.26`

## Timeline

- 2026-11-13T16:47:32+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-109091

## From the sources

A buffer overflow in handling EDID Display-Range descriptors in X.Org xwayland before 24.1.15 and X Server before 21.1.26 could be used by malicious monitors to crash the x server or execute cote.

---

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