FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0, an authenticated RDP client can advertise DVI ADPCM with nBlockAlign equal to 8 and nChannels equal to 2 to make the `bs` calculation in rdpsnd_server_select_format in channels/rdpsnd/server/rdpsnd_main.c equal zero. The subsequent out_frames modulo `bs` operation raises SIGFPE and terminates the server-side rdpsnd channel process. This vulnerability fixed in 3.28.0.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade freerdp-server-debuginfoUpgrade freerdp-libsUpgrade libwinpr-debuginfoUpgrade freerdp-serverUpgrade libwinprUpgrade freerdp-develUpgrade freerdp-debuginfoUpgrade freerdp-debugsourceUpgrade libwinpr-develUpgrade freerdpUpgrade freerdp-libs-debuginfo | Sep 30, 2026 | Aug 19, 2026 |
| Redhat_linux | — | No solution exists | Aug 24, 2026 | Aug 19, 2026 |
| Ubuntu | — | Upgrade freerdp3 | Aug 30, 2026 | Aug 20, 2026 |
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