Bug 2549777 (CVE-2026-109251) - CVE-2026-109251 freerdp: FreeRDP: Denial of Service via invalid video geometry coordinates
Summary: CVE-2026-109251 freerdp: FreeRDP: Denial of Service via invalid video geometr...
Keywords:
Status: NEW
Alias: CVE-2026-109251
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 16:47 UTC by OSIDB Bzimport
Modified: 2026-10-13 10:35 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-10-12 16:47:15 UTC 
FreeRDP before 3.32.0 stores the server-supplied signed MS-RDPEGT geometry origin unchecked in an unsigned video surface coordinate, so the blit clamp in gdiVideoShowSurface() wraps in 32-bit arithmetic and is skipped. A malicious RDP server can send a negative topLevelLeft to clients connecting with /video, causing an out-of-bounds write of decoded H.264 picture data or a client abort.
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