FreeRDP <3.23.0: useafterfree in rail_window_free (HashTable_Free)
CVE-2026-26986 Published on February 25, 2026
FreeRDP has heap-use-after-free in rail_window_free
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.
Weakness Type
What is a Dangling pointer Vulnerability?
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
CVE-2026-26986 has been classified to as a Dangling pointer vulnerability or weakness.
Products Associated with CVE-2026-26986
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Affected Versions
FreeRDP Version < 3.23.0 is affected by CVE-2026-26986Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.