Bug 2519821 (CVE-2026-63117) - CVE-2026-63117 FreeRDP: FreeRDP: Denial of Service via ADPCM frame size calculation
Summary: CVE-2026-63117 FreeRDP: FreeRDP: Denial of Service via ADPCM frame size calcu...
Keywords:
Status: NEW
Alias: CVE-2026-63117
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-19 18:07 UTC by OSIDB Bzimport
Modified: 2026-08-19 20:01 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-08-19 18:07:18 UTC 
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.
Note You need to log in before you can comment on or make changes to this bug.