CVE-2026-63117

Published: Aug 19, 2026Modified: Aug 19, 2026

6.5

Vector

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

Exploitability: 2.8 / Impact: 3.6

Source: security-advisories@github.com (Secondary)

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.

Related CWEs

CWE-369

Divide By Zero

The product divides a value by zero.

References (4)

https://github.com/FreeRDP/FreeRDP/commit/b78fc0b138fe8f08a8b102e193ffb32986f4449a

Source: security-advisories@github.com

https://github.com/FreeRDP/FreeRDP/pull/12980

Source: security-advisories@github.com

https://github.com/FreeRDP/FreeRDP/releases/tag/3.28.0

Source: security-advisories@github.com

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-v64m-xxfw-hrv6

Source: security-advisories@github.com

Timeline

No history available yet.