Security Advisory

CVE-2026-23532

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2026-01-19 17:03:51

Last updated 2026-01-20 21:37:53

Assigner GitHub_M

State PUBLISHED

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, a client-side heap buffer overflow occurs in the FreeRDP client’s `gdi_SurfaceToSurface` path due to a mismatch between destination rectangle clamping and the actual copy size. A malicious server can trigger a client‑side heap buffer overflow, causing a crash (DoS) and potential heap corruption with code‑execution risk depending on allocator behavior and surrounding heap layout. Version 3.21.0 contains a patch for the issue.

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