CVE-2026-63117CWE-369

CVE-2026-63117

Medium · published August 19, 2026

CVSS v3.1

6.5

EPSS

Percentile

45.3

In the wild

Unconfirmed

What it is

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.

The record

Technical detail

CVSS v3.1: 6.5 · MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0: Not supplied
EPSS: 0.00552 · 45.3th percentile
Weakness: CWE-369 · Divide By Zero
Published: 2026-08-19T22:17Z

Affected products (1)

Product	Versions	Fixed in
freerdp/freerdp	< 3.28.0	3.28.0

References (4)

https://github.com/FreeRDP/FreeRDP/commit/b78fc0b138fe8f08a8b102e193ffb32986f4449a · [email protected]https://github.com/FreeRDP/FreeRDP/pull/12980 · [email protected]https://github.com/FreeRDP/FreeRDP/releases/tag/3.28.0 · [email protected]https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-v64m-xxfw-hrv6 · [email protected]

EPSS history

Timeline

19 AUG 17:55Z
FreeRDP: Denial of service through ADPCM frame size calculation
cvelistv5