CVE-2026-67299 - FreeRDP before 3.29.0 Use-After-Free via WindowIcon async message

CVE-2026-67299 - FreeRDP before 3.29.0 Use-After-Free via WindowIcon async message

https://cvefeed.io/rssfeed/latest.atom / Sat, 08/01/2026 - 16:08
CVE ID :CVE-2026-67299
Published : Aug. 1, 2026, 12:22 p.m. | 31 minutes ago
Description :FreeRDP before 3.29.0 contains a client-side heap use-after-free in the async update message proxy for WINDOW_ICON_ORDER when AsyncUpdate is enabled (e.g. xfreerdp /async-update). In update_message_WindowIcon() a shallow CopyMemory() overwrites a freshly allocated lParam->iconInfo with the parser-owned windowIcon->iconInfo pointer. After the parser callback returns, update_recv_window_info_order() frees window_icon.iconInfo, but the queued async message still retains and later dispatches that stale pointer. A malicious or compromised RDP server sending a crafted RAIL Window Alternate Secondary Order with WINDOW_ORDER_ICON can trigger use-after-free, leading to memory corruption and client crash.
Severity: 8.7 | HIGH
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