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CVE-2026-45700— Heap-buffer-overflow write in planar bitmap decoder

AI Predicted 8.1 Difficulty: Moderate
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I. Basic Information for CVE-2026-45700

Vulnerability Information
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Vulnerability Title
Heap-buffer-overflow write in planar bitmap decoder
Source: NVD (National Vulnerability Database)
Vulnerability Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.26.0, FreeRDP's planar bitmap decoder has an out-of-bounds heap write when decoding RLE planar data. In libfreerdp/codec/planar.c, freerdp_bitmap_decompress_planar() validates the X destination coordinate nXDst against the caller-provided destination stride (nDstStep) even when it is writing into the internal temp buffer pTempData. An attacker can bypass the check with a large nDstStep and a large nXDst, causing planar_decompress_plane_rle() to write past the end of pTempData. This vulnerability is fixed in 3.26.0.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨界内存写
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
FreeRDPFreeRDP < 3.26.0 -

II. Public POCs for CVE-2026-45700

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III. Intelligence Information for CVE-2026-45700

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Vendor Advisories for CVE-2026-45700 (1)

Same Patch Batch · FreeRDP · 2026-05-29 · 4 CVEs total

CVE-2026-444208.8 HIGHFreeRDP cliprdr server heap-buffer-overflow via undersized capabilitySetLength in CB_CLIP_
CVE-2026-444218.8 HIGHFreeRDP RDPGFX CacheToSurface heap-buffer-overflow via clamped-rectangle validation bypass
CVE-2026-444227.5 HIGHFreeRDP RDPEAR NDR ref-id aliasing causes client-side UAF/double-free and type confusion

IV. Related Vulnerabilities

Same product: FreeRDP
Same vendor: FreeRDP
Same weakness: CWE-787

V. Comments for CVE-2026-45700

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