Bug 2549822 (CVE-2026-109246) - CVE-2026-109246 freerdp: freerdp: Denial of Service via divide-by-zero error in shadow server
Summary: CVE-2026-109246 freerdp: freerdp: Denial of Service via divide-by-zero error ...
Keywords:
Status: NEW
Alias: CVE-2026-109246
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-12 16:54 UTC by OSIDB Bzimport
Modified: 2026-10-13 10:46 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
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Description OSIDB Bzimport 2026-10-12 16:54:33 UTC 
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.
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