#VU125355 Use-after-free in FreeRDP - CVE-2026-25997

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Main Vulnerability Database Vulnerabilities #VU125355

#VU125355 Use-after-free in FreeRDP - CVE-2026-25997

Published: April 8, 2026


Vulnerability identifier: #VU125355
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-25997
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
FreeRDP
Software vendor:
FreeRDP

Description

The vulnerability allows a remote attacker to cause a denial of service and potentially execute arbitrary code.

The vulnerability exists due to use-after-free in xf_clipboard_format_equal when processing clipboard format changes during auto-reconnect. A remote attacker can trigger a client reconnection sequence and concurrent clipboard activity to cause a denial of service and potentially execute arbitrary code.

The issue is client-side and occurs because the cliprdr channel thread frees lastSentFormats while the X11 event thread concurrently iterates it.


Remediation

Install security update from vendor's website.

External links