TI-2026-84293 Aliases CVE-2026-121411 GHSA-f8g9-jggc-hwp5

FreeRDP X11 client abort via malicious RDPGFX scaled output

LOW 11CWE-20Published 2026-11-03 · Updated 2026-11-03

Key facts

Attack vector: Network
Privileges required: None
User interaction: Passive
Attack complexity: High
Attack requirements: Present
Impact type: —
Confidentiality · integrity · availability: None · None · Low
Fix status: Partial Red Hat: 5 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.

Summary

FreeRDP before 3.32.2 does not bound server-supplied target dimensions and output origin in RDPGFX MAPSURFACETOSCALEDOUTPUT PDUs, an improper input validation flaw (CWE-20). A malicious RDP server can send an oversized scaled output mapping that aborts the X11 client. The attack needs a user to connect to the malicious server.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Description from the CNA

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 freerdp_image_scale stride assertion failures that terminate the client.

Why it matters now

EPSS 0.00229 13th percentileScored 2026-11-07

Fix Partial FreeRDP (FreeRDP): 3.32.2Red Hat: 5 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
FreeRDP	FreeRDP	before 3.32.2	3.32.2	Patch available	CNA

FreeRDP VendorFreeRDP Affected before 3.32.2 Fixed in 3.32.2 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:freerdp:freerdp::::::::	before 3.32.2	Vulnerable	FreeRDP

cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:* Versions before 3.32.2 Vulnerable ·FreeRDP

Remediation

Update FreeRDP to 3.32.2 or later. Red Hat Enterprise Linux 10, 9, 8 and 7 have no fix available, and Red Hat Enterprise Linux 6 has no fix planned.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Fix · CNA FreeRDP (FreeRDP) Fixed in 3.32.2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-11-03
FreeRDP 3.32.2
27 records Highest priority Priority HIGH 3 HIGH, 11 MEDIUM, 13 LOW
Other records, highest priority first
- TI-2026-84268 Denial of service in FreeRDP WinPR PNG and JPEG image readersPriority HIGH 77
- TI-2026-84291 Denial of service in FreeRDP via oversized X.224 routing tokenPriority HIGH 69
- TI-2026-84280 Use-after-free in FreeRDP dyn-channel-dump modulePriority HIGH 69
Show all 27 records →

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 10	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 6	Affected	No fix planned: Out of support scope
Red Hat Enterprise Linux 7	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 8	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 9	Affected	No fix yet: Fix deferred

Timeline

2026-11-03 Threatist record created from CVE-2026-121411
2026-11-03 Alias added: GHSA-f8g9-jggc-hwp5
2026-11-04 Affected versions changed · Red Hat
2026-11-04 CVSS score added · Red Hat

References

Advisory 1

GitHub Security Advisory (GHSA-wffv-rjv2-h2x2)

TI-2026-85092 Use-after-free in FreeRDP rdpgfx channel close handling CVSS 4.0CRITICAL 9.3
TI-2026-85091 Out-of-bounds write in FreeRDP proxy via bitmap cache v2 capability CVSS 4.0CRITICAL 9.3
TI-2026-24435 FreeRDP has a `size_t` underflow in ADPCM decoder leads to heap-buffer-overflow write CVSS 3.1CRITICAL 9.8
TI-2023-21373 Out-Of-Bounds Write in FreeRDP CVSS 3.1CRITICAL 9.8
TI-2022-08692 Server side NTLM does not properly check parameters in FreeRDP CVSS 3.1CRITICAL 9.1
TI-2023-21374 Out-Of-Bounds Read in FreeRDP CVSS 3.1CRITICAL 9.1

See all 336 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences