Medium severity6.5NVD Advisory· Published Aug 19, 2026· Updated Sep 24, 2026
CVE-2026-63117
CVE-2026-63117
Description
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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2Patches
Vulnerability mechanics
References
4- github.com/FreeRDP/FreeRDP/commit/b78fc0b138fe8f08a8b102e193ffb32986f4449anvdPatch
- github.com/FreeRDP/FreeRDP/pull/12980nvdIssue TrackingPatch
- github.com/FreeRDP/FreeRDP/security/advisories/GHSA-v64m-xxfw-hrv6nvdVendor Advisory
- github.com/FreeRDP/FreeRDP/releases/tag/3.28.0nvdRelease Notes
News mentions
1- FreeRDP: Ten Vulnerabilities Disclosed Together, Ranging from Medium to High SeverityVypr Intelligence · Aug 19, 2026