---
id: "CVE-2026-121402"
kind: "vulnerability"
aliases: ["CVE-2026-121402"]
title: "FreeRDP: malicious RDP server crashes xfreerdp client via ResetGraphics"
severity: "high"
cvss: 7.1
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["freerdp", "linux", "package", "remote-desktop", "xfreerdp"]
not_affected_if: ["trusted-rdp-servers-only"]
published_at: "2026-11-03T15:17:28+00:00"
first_seen_at: "2026-11-03T15:21:57+00:00"
updated_at: "2026-11-03T15:23:01+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121402", "first_seen_at": "2026-11-03T15:21:57+00:00"}]
---

# FreeRDP: malicious RDP server crashes xfreerdp client via ResetGraphics

FreeRDP before 3.32.2 has a NULL pointer dereference that lets a malicious RDP server crash the xfreerdp client. A zero-width RDPGFX ResetGraphics message leaves the display null, and a later bitmap update crashes the client.

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

## How to check

- Check the FreeRDP version with `xfreerdp --version`
- Look for FreeRDP builds older than `3.32.2` in your packages or bundled binaries

## Fix

- FreeRDP: upgrade to `3.32.2` or later

## Timeline

- 2026-11-03T15:21:57+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121402

## Documents

- [advisory] Vendor advisory: github.com https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-c426-ppvf-jpfg
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/freerdp-before-3.32.2-x11-client-crash-via-zero-width-rdpgfx-resetgraphics

## From the sources

FreeRDP before 3.32.2 contains a NULL pointer dereference vulnerability that allows malicious RDP servers to crash xfreerdp clients by sending a zero-width RDPGFX ResetGraphics PDU. The failed resize in gdi_resize_ex leaves the primary display null without ending the session, so a later bitmap update crashes the client in gdi_Bitmap_Paint.

---

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