CVE-2026-25997
CRITICALCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
4Tags
Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, `xf_clipboard_format_equal` reads freed `lastSentFormats` memory because `xf_clipboard_formats_free` (called from the cliprdr channel thread during auto-reconnect) frees the array while the X11 event thread concurrently iterates it in `xf_clipboard_changed`, triggering a heap use after free. Version 3.23.0 fixes the issue.
Analysis
Use-after-free in FreeRDP xf_clipboard_format_equal before 3.23.0. Clipboard format comparison uses freed memory. …
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Remediation
Within 24 hours: Identify and inventory all systems running FreeRDP; assess which systems are internet-facing or accessible from untrusted networks; restrict network access to FreeRDP services to authorized users only. Within 7 days: Apply the available vendor patch to all FreeRDP installations; prioritize internet-facing and critical systems first. …
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External POC / Exploit Code
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