CVE-2026-25941

Description

A flaw was found in the FreeRDP client. A malicious Remote Desktop Protocol (RDP) server can exploit an out-of-bounds read vulnerability in the RDPGFX channel. By sending a specially crafted WIRE_TO_SURFACE_2 Protocol Data Unit (PDU) with a bitmapDataLength value exceeding the actual data, an attacker can read uninitialized heap memory. This can lead to sensitive information disclosure or cause the client to crash.

Mitigation

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Common Vulnerability Scoring System (CVSS) Score Details

Info alert:Important note

CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).

The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 Score Breakdown

Red HatNVDcve.org
Base Score5.48.14.3
Attack VectorNetworkNetworkNetwork
Attack ComplexityLowLowLow
Privileges RequiredNoneNoneNone
User InteractionRequiredRequiredRequired
ScopeUnchangedUnchangedUnchanged
ConfidentialityLowHighLow
Integrity ImpactNoneNoneNone
Availability ImpactLowHighNone

Vector

Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L

NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Understanding the Weakness (CWE)

CWE-130

Confidentiality,Integrity

Technical Impact: Read Memory; Modify Memory; Varies by Context

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