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Windows CVE-2026-26986

HIGH
Use After Free (CWE-416)
2026-02-25 security-advisories@github.com
Windows Freerdp Red Hat Suse
7.5
CVSS 3.1 · GitHub Advisory
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Severity by source

GitHub Advisory PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SUSE
HIGH
qualitative
Red Hat
5.3 MEDIUM
qualitative

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

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

Lifecycle Timeline

4
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
PoC Detected
Feb 27, 2026 - 19:11 vuln.today
Public exploit code
Patch released
Feb 27, 2026 - 19:11 nvd
Patch available
CVE Published
Feb 25, 2026 - 22:16 nvd
HIGH 7.5

DescriptionGitHub Advisory

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, rail_window_free dereferences a freed xfAppWindow pointer during HashTable_Free cleanup because xf_rail_window_common calls free(appWindow) on title allocation failure without first removing the entry from the railWindows hash table, leaving a dangling pointer that is freed again on disconnect. Version 3.23.0 fixes the vulnerability.

AnalysisAI

FreeRDP is a free implementation of the Remote Desktop Protocol. [CVSS 7.5 HIGH]

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  • Risk assessment & exploitation conditions
  • Attack chain visualization
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Initiate RDP connection to FreeRDP server
Exploit
Trigger title allocation failure in xf_rail_window_common
Execution
Dereference freed xfAppWindow pointer
Impact
Cause denial of service on disconnect
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Vulnerability AssessmentAI

Exploitation FreeRDP versions prior to 3.23.0 with RAIL (Remote Application Integrated Locally) window management enabled. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment CVSS 7.5 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario A remote attacker could exploit this vulnerability to compromise the affected system.
Remediation A vendor patch is available — apply it immediately. … Detailed patch versions, workarounds, and compensating controls in full report.
Sign in to read full assessment

Recommended ActionAI

Within 24 hours: Identify all systems running FreeRDP and assess exposure scope, prioritizing jump servers and administrative access points. …

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Threat intelligence, references, and detailed analysis are available after sign-in.

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Vendor StatusVendor

SUSE

Severity: High
Product Status
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
SUSE Linux Enterprise Server 15 SP7 Fixed

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CVE-2026-26986 vulnerability details – vuln.today
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