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CVE-2026-109251

6.0 medium SSVC exploitation: poc Undergoing Analysis
NVD · CVE.org

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.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 2

  1. StatusAwaiting Analysis → Undergoing AnalysisNVD modified 2026-10-18 12:17
  2. First seenCVSS 6.0NVD modified 2026-10-14 20:11

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 3