CVE-2026-109246
freerdp: freerdp: Denial of Service via divide-by-zero error in shadow server
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 13, 2026
Updated · October 14, 2026
Description
A flaw was found in FreeRDP. An authenticated client can trigger a Denial of Service (DoS) by sending a specially crafted frame acknowledgment message to the shadow server. Due to missing input validation on the frame identifier, an arithmetic error causes a divide-by-zero condition. This terminates the shadow server process, abruptly disconnecting all active session viewers.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-369 · Divide By Zero