VDB
CVE-2026-63117
CVE-2026-63117
PUBLISHED
CVSS 6.5 MEDIUM
Reported by GitHub_M · Published August 19, 2026
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.
Risk Scores
CVSS 3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| FreeRDP | FreeRDP | < 3.28.0 |
| FreeRDP | FreeRDP | < 3.28.0 |
Timeline
- Jul 28, 2026 CVE Published
References
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-v64m-xxfw-hrv6 x_refsource_CONFIRM
- https://github.com/FreeRDP/FreeRDP/pull/12980 x_refsource_MISC
- https://github.com/FreeRDP/FreeRDP/commit/b78fc0b138fe8f08a8b102e193ffb32986f4449a x_refsource_MISC
- https://github.com/FreeRDP/FreeRDP/releases/tag/3.28.0 x_refsource_MISC