CVE-2026-26986
High
Description
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.
SeverityHigh
CVSS7.5
Exploit probability—
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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