CVE-2026-40033 - FreeRDP - Heap-buffer-overflow in gdi_CacheToSurface via rectangle validation bypass

CVE-2026-40033 - FreeRDP - Heap-buffer-overflow in gdi_CacheToSurface via rectangle validation bypass

https://cvefeed.io/rssfeed/latest.atom / Tue, 05/26/2026 - 17:25
CVE ID :CVE-2026-40033
Published : May 26, 2026, 2:08 p.m. | 52 minutes ago
Description :FreeRDP before 3.26.0 contains a heap-buffer-overflow vulnerability in gdi_CacheToSurface that allows remote attackers to write out-of-bounds heap memory. The vulnerability occurs because rectangle validation clamps coordinates to UINT16_MAX but performs copy operations using unclamped cache entry dimensions, enabling malicious RDP servers to trigger large out-of-bounds writes and potentially achieve remote code execution or client crash.
Severity: 8.8 | HIGH
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