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Freerdp CVE-2026-25953

CRITICAL
Use After Free (CWE-416)
2026-02-25 security-advisories@github.com
Use After Free Freerdp Red Hat Suse
Critical
Disputed · 9.8 NVD
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Severity by source

Sources disagree (Medium–Critical)
GitHub Advisory PRIMARY
9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SUSE
CRITICAL
qualitative
Red Hat
4.3 MEDIUM
qualitative

vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

4
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
PoC Detected
Feb 27, 2026 - 14:55 vuln.today
Public exploit code
Patch released
Feb 27, 2026 - 14:55 nvd
Patch available
CVE Published
Feb 25, 2026 - 21:16 nvd
CRITICAL 9.8

DescriptionGitHub Advisory

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, xf_AppUpdateWindowFromSurface reads from a freed xfAppWindow because the RDPGFX DVC thread obtains a bare pointer via xf_rail_get_window without any lifetime protection, while the main thread can concurrently delete the window through a fastpath window-delete order. Version 3.23.0 fixes the issue.

AnalysisAI

Use-after-free in FreeRDP xf_AppUpdateWindowFromSurface before 3.23.0. Surface-to-window update triggers memory corruption. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Connect to malicious RDP server
Exploit
Server sends crafted fastpath window-delete order
Execution
RDPGFX DVC thread reads freed pointer
Impact
Execute arbitrary code with client privileges
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Vulnerability AssessmentAI

Exploitation FreeRDP versions prior to 3.23.0 with RDPGFX DVC (Dynamic Virtual Channel) support enabled connecting to an attacker-controlled RDP server. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment CVSS 9.8. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario RDP server sends surface updates that trigger UAF in the client's window management.
Remediation Update FreeRDP to 3.23.0. Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: Identify all systems running FreeRDP using asset inventory and vulnerability scanning; disable FreeRDP services on non-critical systems. …

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Vendor StatusVendor

SUSE

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

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CVE-2026-25953 vulnerability details – vuln.today
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