HIGHVulnerability
Verified
Global

NVD HIGH: CVE-2026-67301 — FreeRDP before 3.29.0 contains out-of-bounds read vulnerabilities in the async u...

·Source: NIST NVD

Updated:

Executive Summary

FreeRDP before 3.29.0 contains out-of-bounds read vulnerabilities in the async update message proxy for the PolygonSC and PolygonCB primary drawing orders. When AsyncUpdate is enabled (e.g., xfreerdp /async-update), update_message_PolygonSC() and update_message_PolygonCB() allocate a fresh points array but copy point data from the address of the order structure instead of from polygonSC->points /

Analysis

FreeRDP before 3.29.0 contains out-of-bounds read vulnerabilities in the async update message proxy for the PolygonSC and PolygonCB primary drawing orders. When AsyncUpdate is enabled (e.g., xfreerdp /async-update), update_message_PolygonSC() and update_message_PolygonCB() allocate a fresh points array but copy point data from the address of the order structure instead of from polygonSC->points / polygonCB->points, resulting in a client-side out-of-bounds read. A malicious or compromised RDP server sending crafted PolygonSC/PolygonCB update orders can trigger memory disclosure or a client crash. CVSS Score: 7.5. Published: 2026-08-01T13:16:59.530.

Indicators of Compromise (1)

CVE (1)
CVE-2026-67301
NVDMITRE CVE
Source Attribution

Originally published by NIST NVD on Aug 1, 2026. Verified by: NIST.

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