CVE-2026-63117

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.

CVSS 3.1

6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0.6% chance of exploitation in the next 30 days; higher than 45% of CVEs (scores of 2026-10-25)

CWE

CWE-369

Published

2026-08-19

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• freerdp:freerdp

References

• https://github.com/FreeRDP/FreeRDP/commit/b78fc0b138fe8f08a8b102e193ffb32986f4449a
• https://github.com/FreeRDP/FreeRDP/pull/12980
• https://github.com/FreeRDP/FreeRDP/releases/tag/3.28.0
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-v64m-xxfw-hrv6

Check your stackJSON