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CVE-2026-26986

FreeRDP has heap-use-after-free in rail_window_free

CVSS 4.0 5.5 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-26986

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-26986

Published

FreeRDP

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "FreeRDP",
                    "product": "FreeRDP",
                    "versions": [
                        {
                            "version": "< 3.23.0",
                            "status": "affected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON