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Freerdp CVE-2026-57156

| EUVDEUVD-2026-43007 HIGH
Heap-based Buffer Overflow (CWE-122)
2026-07-09 vendor:ubuntu
Buffer Overflow Heap Overflow Red Hat Freerdp Suse
8.6
CVSS 4.0 · Vendor: vendor:ubuntu
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Severity by source

Vendor (vendor:ubuntu) PRIMARY
8.6 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
8.8 HIGH

Malicious server reachable over the network with no client privileges, but the victim must initiate the connection (UI:R); heap overflow yields high C/I/A with no scope change.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SUSE
8.8 HIGH
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Red Hat
8.8 HIGH
qualitative

Primary rating from Vendor (vendor:ubuntu).

CVSS VectorVendor: vendor:ubuntu

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
A
Scope
X

Lifecycle Timeline

7
Patch available
Jul 10, 2026 - 21:02 EUVD
Analysis Updated
Jul 10, 2026 - 20:31 vuln.today
v3 (cvss_changed)
Source Code Evidence Fetched
Jul 10, 2026 - 20:31 vuln.today
Analysis Updated
Jul 10, 2026 - 20:31 vuln.today
v2 (cvss_changed)
Re-analysis Queued
Jul 10, 2026 - 20:22 vuln.today
cvss_changed
CVSS changed
Jul 10, 2026 - 20:22 NVD
8.6 (HIGH)
Analysis Generated
Jul 09, 2026 - 15:33 vuln.today

DescriptionCVE.org

[Unknown description]

AnalysisAI

Heap-based buffer overflow in FreeRDP (the widely used open-source RDP client library) allows a malicious or compromised RDP server to corrupt client memory and potentially achieve remote code execution in the connecting client's context. The flaw lives in the primary drawing-order parser (update_read_delta_points in libfreerdp/core/orders.c), where an inverted integer-overflow guard let an attacker-controlled point count produce an undersized heap allocation followed by an out-of-bounds write. No public exploit identified at time of analysis; the issue is fixed in FreeRDP 3.28.0 (GHSA-v5wf-j8j4-77h7).

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Use-after-free in FreeRDP xf_clipboard_format_equal before 3.23.0. Clipboard format comparison uses freed memory. Fifth

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Use-after-free in FreeRDP xf_AppUpdateWindowFromSurface before 3.23.0. Surface-to-window update triggers memory corrupti
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Use-after-free in FreeRDP xf_SetWindowMinMaxInfo before version 3.23.0. X11 client window management triggers memory cor
CVE-2026-25959 CRITICAL POC
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Use-after-free in FreeRDP xf_cliprdr_provide_data clipboard handling before 3.23.0. Clipboard data exchange triggers mem
CVE-2026-22857 CRITICAL POC
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FreeRDP IRP thread handler has a use-after-free where the IRP is freed by Complete() then accessed on the error path. Fi
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FreeRDP drive read heap overflow when server-controlled read length exceeds IRP output buffer. Fixed in 3.20.1. PoC avai
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FreeRDP client before 3.20.1 has a heap buffer overflow in AUDIN format processing. A malicious RDP server can corrupt m
CVE-2026-25955 CRITICAL POC
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Use-after-free in FreeRDP xf_AppUpdateWindowFromSurface before 3.23.0. Different code path from CVE-2026-25953. PoC and

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9.8 Apr 22

FreeRDP is a free implementation of the Remote Desktop Protocol. Rated critical severity (CVSS 9.8), this vulnerability

CVE-2023-40574 CRITICAL POC
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FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. Rated critical
CVE-2023-40569 CRITICAL POC
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FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. Rated critical
CVE-2023-40567 CRITICAL POC
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FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. Rated critical

Same weakness CWE-122 – Heap-based Buffer Overflow

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CVE-2026-85880 HIGH POC
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CVE-2025-24985 HIGH POC
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CVE-2026-53362 HIGH POC
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CVE-2025-21418 HIGH
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CVE-2023-23376 HIGH
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Same technique Buffer Overflow

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CVE-2019-11043 CRITICAL POC
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CVE-2009-0927 HIGH POC
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CVE-2012-1889 HIGH POC
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Vendor StatusVendor

SUSE

Severity: Important
Product Status
openSUSE Tumbleweed Fixed
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise Module for Package Hub 15 SP7 Affected
SUSE Linux Enterprise Module for Package Hub 15 SP7 Affected

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CVE-2026-57156 vulnerability details – vuln.today
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