# CVE-2026-121402: FreeRDP NULL pointer dereference in RDPGFX ResetGraphics

Source: https://junglewise.ai/threats/cve-2026-121402-freerdp-before-3-32-2-contains-a-null-pointer-dereference  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-03. Updated: 2026-11-03  
License: CC BY 4.0 with a link back

CVE-2026-121402 · Severity: medium · CVSS 6.5 · Published 2026-11-03

FreeRDP is a remote desktop client that allows users to connect to Windows servers over RDP protocol. A malicious RDP server can crash the xfreerdp X11 client by sending a specially crafted graphics command with zero width, causing the client to lose the connection and halting the user's remote session.

Technologies: [FreeRDP Project FreeRDP](https://junglewise.ai/threats/technologies/freerdp-project-freerdp). Vendors: [FreeRDP Project](https://junglewise.ai/threats/vendors/freerdp-project).

## Quick answers

**Is CVE-2026-121402 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-121402 being exploited in the wild.

**How severe is CVE-2026-121402?** Medium severity, with a CVSS score of 6.5, published 3 November 2026.

**Which products and versions are affected?** FreeRDP Project FreeRDP before 3.32.2.

**Is there a fix for CVE-2026-121402?** Yes: fixed in 3.32.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-121402 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-121402?** Check whether you run FreeRDP Project FreeRDP at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 3.32.2

## Technical details

The vulnerability is a NULL pointer dereference in the gdi_Bitmap_Paint function triggered by a zero-width RDPGFX ResetGraphics PDU. When gdi_resize_ex is called with zero dimensions, it frees the primary display surface but fails to recreate it, leaving the pointer null. A subsequent bitmap update attempts to dereference this null pointer, crashing the client. The attack requires a network connection to an RDP server and occurs after graphics capability exchange.

## Affected products

- FreeRDP Project FreeRDP before 3.32.2

## Timeline

- 2026-10-19: disclosed
- 2026-11-03: advisory

## References

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

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- [FreeRDP infinite loop in WebSocket frame handling](https://junglewise.ai/threats/cve-2026-121959-freerdp-before-3-32-2-contains-an-infinite-loop-vulnerability-in)
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- [FreeRDP memory exhaustion in RD Gateway packet handling](https://junglewise.ai/threats/cve-2026-121399-freerdp-before-3-32-2-contains-a-memory-allocation-vulnerability)