---
id: "CVE-2026-93536"
kind: "vulnerability"
aliases: ["CVE-2026-93536"]
title: "X.Org X Server: use-after-free in gesture sprites lets clients crash it"
severity: "medium"
cvss: 5.3
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["infrastructure", "linux-desktop", "self-hosted", "x.org", "xwayland"]
not_affected_if: ["no-x-server", "unauthenticated-clients-blocked", "wayland-only"]
published_at: "2026-10-28T17:18:53+00:00"
first_seen_at: "2026-10-28T17:34:10+00:00"
updated_at: "2026-10-28T17:36:28+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93536", "first_seen_at": "2026-10-28T17:34:10+00:00"}]
---

# X.Org X Server: use-after-free in gesture sprites lets clients crash it

A use-after-free in GestureBuildSprite() in the X.Org X Server and XWayland lets an authenticated X client crash the server. The description says it could also potentially execute code.

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

## How to check

- Run `Xorg -version` or `X -version` and compare against `21.1.25`
- Run `Xwayland -version` and compare against `24.1.14`

## Fix

- Upgrade X.Org X Server to `21.1.25` or later
- Upgrade XWayland to `24.1.14` or later

## Timeline

- 2026-10-28T17:34:10+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-93536

## From the sources

A use after free caused by missing lifecycle management of gesture sprites in GestureBuildSprite() in X.Org X Server before 21.1.25 and XWayland before 24.1.14 could be used by authenticated X clients to crash the X server or potentially execute code.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_