CVE-2026-67305

FreeRDP: FreeRDP Windows Client: Remote Code Execution via Heap Buffer Overflow in Clipboard Processing

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Severity

Important

Red Hat Product Security

7.5

CVSS 3.1

Review impact separately from score.

Published · August 1, 2026

Updated · September 9, 2026

Description

The FreeRDP Windows client contains a heap buffer overflow vulnerability. If a user pastes maliciously crafted, oversized clipboard data from an untrusted RDP server, it triggers memory corruption that may result in remote code execution.

Statement

Red Hat products are not impacted by this vulnerability. The affected codebase (wfreerdp / wf_cliprdr.c) is exclusive to the Windows client, whereas Red Hat Enterprise Linux (RHEL) strictly utilizes and builds Linux clients for FreeRDP.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7.5
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE-122 · Heap-based Buffer Overflow