FreeRDP 3.x RAIL Channel Nullptr Deref of Freed wf Window before v3.23
CVE-2026-25952 Published on February 25, 2026
FreeRDP has heap-use-after-free in xf_SetWindowMinMaxInfo
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, `xf_SetWindowMinMaxInfo` dereferences a freed `xfAppWindow` pointer because `xf_rail_get_window` in `xf_rail_server_min_max_info` returns an unprotected pointer from the `railWindows` hash table, and the main thread can concurrently delete the window (via a window delete order) while the RAIL channel thread is still using the pointer. Version 3.23.0 fixes the issue.
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-2026-25952 has been classified to as a Dangling pointer vulnerability or weakness.
Products Associated with CVE-2026-25952
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Affected Versions
FreeRDP Version < 3.23.0 is affected by CVE-2026-25952Exploit 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.