CVE-2026-121411: FreeRDP before 3.32.2 X11 Client Abort via RDPGFX Scaled Output Geometry

Q: Who is exposed to this issue?

Users running an affected FreeRDP X11 client are exposed when they connect to a malicious RDP server. The issue affects FreeRDP versions before 3.32.2 and is listed for Debian freerdp2 and freerdp3 packages.

Q: What does an attacker need to do to trigger the failure?

An attacker needs to operate or control an RDP server that the victim connects to. The server sends an RDPGFX MAPSURFACETOSCALEDOUTPUT PDU with oversized target dimensions or output-origin values, causing the X11 client to terminate.

Q: Is this a remote code execution issue?

No. The provided impact is denial of service: the malicious server can abort the FreeRDP X11 client. The listed metrics indicate no confidentiality or integrity impact.

Q: What version resolves the issue?

Upgrade FreeRDP to version 3.32.2 or later. The issue is described as affecting versions before 3.32.2.

Published Nov 3, 2026

Updated

FreeRDP before 3.32.2 fails to bound server-supplied target dimensions and output origin in RDPGFX MAPSURFACETOSCALEDOUTPUT PDUs, allowing malicious RDP servers to abort X11 clients. Attackers can map a surface to oversized scaled output, triggering checked UINT16 cast or freerdpimagescale stride assertion failures that terminate the client.

Affected Software

6 affected componentsFixes available

FreeRDP freerdp<3.32.2

debian/freerdp2*

debian/freerdp3*

debian/freerdp3<3.32.2+dfsg-1

3.32.2+dfsg-1

debian/freerdp2<=2.11.7+dfsg1-6~deb12u1

debian/freerdp3<=3.15.0+dfsg-2.1+deb13u3

3.32.2+dfsg-13.33.0+dfsg-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade debian/freerdp3 to a version that resolves this vulnerability.
Fixed in 3.32.2+dfsg-1
Upgrade
Upgrade debian/freerdp3 to a version that resolves this vulnerability.
Fixed in 3.32.2+dfsg-1Fixed in 3.33.0+dfsg-1

Event History

Nov 3, 2026

CVE Published

via MITRE·02:28 PM

Data Sourced

via MITRE·02:28 PM

DescriptionSeverityWeakness

Data Sourced

via NVD·03:17 PM

DescriptionSeverityWeaknessAffected Software

Data Sourced

via OSV·03:17 PM

Affected Software

Frequently Asked Questions

Who is exposed to this issue?

Users running an affected FreeRDP X11 client are exposed when they connect to a malicious RDP server. The issue affects FreeRDP versions before 3.32.2 and is listed for Debian freerdp2 and freerdp3 packages.

What does an attacker need to do to trigger the failure?

An attacker needs to operate or control an RDP server that the victim connects to. The server sends an RDPGFX MAPSURFACETOSCALEDOUTPUT PDU with oversized target dimensions or output-origin values, causing the X11 client to terminate.

Is this a remote code execution issue?

No. The provided impact is denial of service: the malicious server can abort the FreeRDP X11 client. The listed metrics indicate no confidentiality or integrity impact.

What version resolves the issue?

Upgrade FreeRDP to version 3.32.2 or later. The issue is described as affecting versions before 3.32.2.

CVE-2026-121411: FreeRDP before 3.32.2 X11 Client Abort via RDPGFX Scaled Output Geometry

Affected Software

Remediation

Event History

Frequently Asked Questions

Who is exposed to this issue?

What does an attacker need to do to trigger the failure?

Is this a remote code execution issue?

What version resolves the issue?

Company

Resources

Contact

Frequently Asked Questions

Who is exposed to this issue?

What does an attacker need to do to trigger the failure?

Is this a remote code execution issue?

What version resolves the issue?