Copyright © 2012 Red Hat, Inc. All rights reserved. Moderate 2026-08-01T12:22:18 FreeRDP: FreeRDP: Denial of service in camera redirection due to divide-by-zero 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L CWE-369

FreeRDP before 3.29.0 (affected versions <= 3.28.0) contains a divide-by-zero vulnerability in the rdpecam camera redirection client. ecam_dev_process_start_streams_request() parses a server-controlled CAM_MEDIA_TYPE_DESCRIPTION from a StartStreamsRequest PDU but validates only Format and Flags, not FrameRateDenominator. When a malicious or compromised RDP server sends a StartStreamsRequest with FrameRateDenominator set to zero, ecam_encoder_context_init() (channels/rdpecam/client/encoding.c) computes FrameRateNumerator / FrameRateDenominator, causing an integer division by zero (SIGFPE) and termination of the FreeRDP client process. Camera redirection must be enabled on the client for the channel to be reachable. Fixed in FreeRDP 3.29.0.

A flaw was found in FreeRDP, a remote desktop protocol client. A malicious or compromised RDP server can exploit this vulnerability by sending a specially crafted `StartStreamsRequest` with a zero value for `FrameRateDenominator`. If camera redirection is enabled on the client, this action triggers a divide-by-zero error, causing the FreeRDP client process to terminate and resulting in a denial of service for the user.

This vulnerability in FreeRDP affects clients with camera redirection enabled. A malicious RDP server could send a crafted `StartStreamsRequest` PDU, leading to a divide-by-zero error and client process termination, resulting in a denial of service. Exploitation requires user interaction to connect to a compromised server with the vulnerable feature active. To mitigate this issue, disable camera redirection when connecting to untrusted RDP servers. This can be achieved by using the --disable-camera option with the xfreerdp client or by configuring FreeRDP to not enable camera redirection. Disabling this feature will prevent the use of camera redirection functionality. Red Hat Enterprise Linux 10 Fix deferred freerdp Red Hat Enterprise Linux 6 Out of support scope freerdp Red Hat Enterprise Linux 7 Out of support scope freerdp Red Hat Enterprise Linux 8 Fix deferred freerdp Red Hat Enterprise Linux 9 Fix deferred freerdp https://www.cve.org/CVERecord?id=CVE-2026-67302 https://nvd.nist.gov/vuln/detail/CVE-2026-67302 https://github.com/FreeRDP/FreeRDP/commit/1cc783d4c78bd2f66d3a8582dfe70a663d141444 https://github.com/FreeRDP/FreeRDP/commit/5370fb26fbf034ecd11d3026b6ad639b5fff493f https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-v89x-pc32-hqr7 https://www.vulncheck.com/advisories/freerdp-rdpecam-startstreamsrequest-divide-by-zero-denial-of-service