CVE-2026-25997
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability51. percentile0.7%
ProductFreerdp
PublishedFeb 25, 2026
First seenFeb 25, 2026
Weakness typeCWE-416Use after free
How to fix
Update
- freerdp freerdp3.23.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| freerdp freerdp | v < 3.23.0 | 3.23.0 |
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