HIGH 7.1 NVD
CVE-2026-109246
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 store
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.
References
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-6vjv-4hm3-6698
- https://www.vulncheck.com/advisories/freerdp-before-3.32.0-shadow-server-divide-by-zero-vi
This high severity vulnerability with a CVSS score of 7.1 was published on 2026-10-12 via NVD.
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