CVE-2026-109246

MediumCVSS 6.5/10Last modified Nov 2, 2026

Description

FreeRDP before 3.32.0 contains a divide-by-zero vulnerability in the freerdp-shadow-cli shadow server: the frame id in a client's Frame Acknowledge PDU is stored without a range check, so the in-flight frame count in shadow_encoder_inflight_frames() can underflow. An authenticated client can acknowledge a frame id one greater than the last frame sent, causing shadow_encoder_create_frame_id() to divide by zero (SIGFPE) and terminate the process, disconnecting all viewers.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-191CWE-369

Affected software

VendorProductVersions
FreeRDPFreeRDP< 3.32.0

References

Timeline

Published
Oct 12, 2026
Last modified
Nov 2, 2026
NVD status
Analyzed

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CVE-2026-109246: Medium severity, CVSS 6.5 | Vulnix