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.
Fix
Patch, vendor advisory and mitigation references on NVD 3
- https://github.com/FreeRDP/FreeRDP/commit/b78fc0b138fe8f08a8b102e193ffb32986f4449a Patch
- https://github.com/FreeRDP/FreeRDP/pull/12980 Issue Tracking, Patch
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-v64m-xxfw-hrv6 Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 6.5 · freerdpNVD modified 2026-10-26 11:10
Affected (CPE criteria) 1
cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*
References 4
- https://github.com/FreeRDP/FreeRDP/commit/b78fc0b138fe8f08a8b102e193ffb32986f4449a Patch
- https://github.com/FreeRDP/FreeRDP/pull/12980 Issue Tracking, Patch
- https://github.com/FreeRDP/FreeRDP/releases/tag/3.28.0 Release Notes
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-v64m-xxfw-hrv6 Vendor Advisory