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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.

PUBLISHED Reserved 2026-02-17 | Published 2026-02-25 | Updated 2026-02-26 | Assigner GitHub_M




MEDIUM: 5.5CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

Problem types

CWE-416: Use After Free

Product status

< 3.23.0
affected

References

github.com/...reeRDP/security/advisories/GHSA-crqx-g6x5-rx47

github.com/...ommit/b4f0f0a18fe53aa8d47d062f91471f4e9c5e0d51

github.com/...2b4806c2a5c583ca39dd9ef1e/client/X11/xf_rail.c

github.com/...2b4806c2a5c583ca39dd9ef1e/client/X11/xf_rail.c

github.com/...2b4806c2a5c583ca39dd9ef1e/client/X11/xf_rail.c

github.com/...2b4806c2a5c583ca39dd9ef1e/client/X11/xf_rail.c

github.com/...2b4806c2a5c583ca39dd9ef1e/client/X11/xf_rail.c

github.com/...2b4806c2a5c583ca39dd9ef1e/client/X11/xf_rail.c

cve.org (CVE-2026-26986)

nvd.nist.gov (CVE-2026-26986)

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