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FreeRDP CVE-2026-85090

| EUVDEUVD-2026-70300 MEDIUM
Out-of-bounds Read (CWE-125)
2026-09-03 VulnCheck GHSA-xxh7-m6m8-7839
Information Disclosure Red Hat Freerdp Suse
5.3
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
5.3 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:L/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
5.4 MEDIUM

Malicious server triggers client OOB read on connection (AV:N/PR:N/UI:R); read-only heap leak (C:L) and crash risk (A:L) with no integrity impact.

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

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

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

Lifecycle Timeline

3
Metadata Corrected
Sep 03, 2026 - 01:40 vuln.today
tag: Buffer Overflow removed
Source Code Evidence Fetched
Sep 03, 2026 - 01:30 vuln.today
Analysis Generated
Sep 03, 2026 - 01:30 vuln.today

DescriptionCVE.org

FreeRDP before 3.31.0 contains a heap out-of-bounds read vulnerability in the general_ChromaV1ToYUV444 function during AVC444 chroma plane reconstruction. A malicious RDP server can craft a RFX_AVC444_BITMAP_STREAM with specific frame geometry to trigger an out-of-bounds memory read past the allocated luma plane.

AnalysisAI

Heap out-of-bounds read in FreeRDP before 3.31.0 allows a malicious RDP server to trigger adjacent heap memory disclosure and potential client instability by sending a crafted RFX_AVC444_BITMAP_STREAM during AVC444 chroma reconstruction. The root cause is a missing row-index bounds check in general_ChromaV1ToYUV444 (and its ARM NEON and x86 SSE4.1 counterparts), causing memcpy to read past the end of the allocated luma plane when the server specifies specific frame geometry. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation The victim must actively connect to an attacker-controlled RDP server using a FreeRDP-based client (version prior to 3.31.0). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:L) accurately reflects the limited but real impact: a network-reachable flaw requiring only passive user interaction, with low confidentiality and availability consequences and no integrity impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade FreeRDP to version 3.31.0 or later. … Detailed patch versions, workarounds, and compensating controls in full report.
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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
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
SUSE Linux Enterprise Server 15 SP7 Affected

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CVE-2026-85090 vulnerability details – vuln.today
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